Webster's Dictionary, 1913

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Ahoy interj. [ Middle English a, interj. + hoy .] (Nautical) A term used in hailing; as, "Ship ahoy ."

Ahriman noun [ Persian ] The Evil Principle or Being of the ancient Persians; the Prince of Darkness as opposer to Ormuzd , the King of Light.

Ahu noun [ Native name.] (Zoology) The Asiatic gazelle.

Ahull adverb [ Prefix a- + hull .] (Nautical) With the sails furled, and the helm lashed alee; -- applied to ships in a storm. See Hull , noun

Ahungered adjective [ Prefix a- + hungered .] Pinched with hunger; very hungry. C. Bronté.

Ai noun ; plural Ais [ Braz. , haï , from the animal's cry: confer French .] (Zoology) The three-toed sloth ( Bradypus tridactylus ) of South America. See Sloth .

Aiblins, Ablins adverb [ See Able .] Perhaps; possibly. [ Scotch] Burns.

Aich's metal A kind of gun metal, containing copper, zinc, and iron, but no tin.

Aid transitive verb [ imperfect & past participle Aided ; present participle & verbal noun Aiding .] [ French aider , Old French aidier , from Latin adjutare to help, freq. of adjuvare to help; ad + juvare to help. Confer Adjutant .] To support, either by furnishing strength or means in coöperation to effect a purpose, or to prevent or to remove evil; to help; to assist.

You speedy helpers . . .
Appear and aid me in this enterprise.
Shak.

Syn. -- To help; assist; support; sustain; succor; relieve; befriend; coöperate; promote. See Help .

Aid noun [ French aide , Old French aïde , aïe , from the verb. See Aid , transitive verb ]
1. Help; succor; assistance; relief.

An unconstitutional mode of obtaining aid .
Hallam.

2. The person or thing that promotes or helps in something done; a helper; an assistant.

It is not good that man should be alone; let us make unto him an aid like unto himself.
Tobit viii. 6.

3. (Eng. Hist.) A subsidy granted to the king by Parliament; also, an exchequer loan.

4. (Feudal Law) A pecuniary tribute paid by a vassal to his lord on special occasions. Blackstone.

5. An aid-de-camp, so called by abbreviation; as, a general's aid .

Aid prayer (Law) , a proceeding by which a defendant beseeches and claims assistance from some one who has a further or more permanent interest in the matter in suit. -- To pray in aid , to beseech and claim such assistance.

Aid-de-camp noun ; plural Aids-de-camp . [ French aide de camp (literally) camp assistant.] (Mil.) An officer selected by a general to carry orders, also to assist or represent him in correspondence and in directing movements.

Aid-major noun The adjutant of a regiment.

Aidance noun [ Confer Old French aidance .] Aid. [ R.]

Aidance 'gainst the enemy.
Shak.

Aidant adjective [ Confer French aidant , present participle of aider to help.] Helping; helpful; supplying aid. Shak.

Aider noun One who, or that which, aids.

Aidful adjective Helpful. [ Archaic.] Bp. Hall.

Aidless adjective Helpless; without aid. Milton.

Aiel noun See Ayle . [ Obsolete]

Aiglet noun Same as Aglet .

Aigre adjective [ French See Eager .] Sour. [ Obsolete] Shak.

Aigremore noun [ French origin unknown.] Charcoal prepared for making powder.

Aigret, Aigrette noun [ French, a sort of white heron, with a tuft of feathers on its head; a tuft of feathers; dim. of the same word as heron . See Heron , and confer Egret , Egrette .]
1. (Zoology) The small white European heron. See Egret .

2. A plume or tuft for the head composed of feathers, or of gems, etc. Prescott.

3. A tuft like that of the egret. (Botany) A feathery crown of seed; egret; as, the aigrette or down of the dandelion or the thistle.

Aiguille noun [ French, a needle. See Aglet .]
1. A needle-shaped peak.

2. An instrument for boring holes, used in blasting.

Aiguillette noun [ French See Aglet .]
1. A point or tag at the end of a fringe or lace; an aglet.

2. One of the ornamental tags, cords, or loops on some military and naval uniforms.

Aigulet noun See Aglet . Spenser.

Ail (āl) transitive verb [ imperfect & past participle Ailed (āld); present participle & verbal noun Ailing .] [ Middle English eilen , ailen , Anglo-Saxon eglan to trouble, pain; akin to Goth. us- agljan to distress, agls troublesome, irksome, aglo , aglitha , pain, and probably to English awe . √3.] To affect with pain or uneasiness, either physical or mental; to trouble; to be the matter with; -- used to express some uneasiness or affection, whose cause is unknown; as, what ails the man? I know not what ails him.

What aileth thee, Hagar?
Gen. xxi. 17.

» It is never used to express a specific disease. We do not say, a fever ails him; but, something ails him.

Ail intransitive verb To be affected with pain or uneasiness of any sort; to be ill or indisposed or in trouble.

When he ails ever so little . . . he is so peevish.
Richardson.

Ail noun Indisposition or morbid affection. Pope.

Ailanthus noun Same as Ailantus .

Ailantus noun [ From aylanto , i. e., tree of heaven, the name of the tree in the Moluccas.] (Botany) A genus of beautiful trees, natives of the East Indies. The tree imperfectly diœcious, and the staminate or male plant is very offensive when blossom.

Aileron noun [ French, dim. of aile wing.]
1. A half gable, as at the end of a penthouse or of the aisle of a church.

2. (Aëronautics) A small plane or surface capable of being manipulated by the pilot of a flying machine to preserve or destroy lateral balance; a hinged wing tip; a lateral stabilizing or balancing plane.

Ailette noun [ French ailette , dim. of aile wing, Latin ala .] A small square shield, formerly worn on the shoulders of knights, -- being the prototype of the modern epaulet. Fairholt.

Ailment noun Indisposition; morbid affection of the body; -- not applied ordinarily to acute diseases. "Little ailments ." Landsdowne.

Ailuroidea noun plural [ New Latin , from Greek ... cat + -oid .] (Zoology) A group of the Carnivora, which includes the cats, civets, and hyenas.

Aim intransitive verb [ imperfect & past participle Aimed ; present participle & verbal noun Aiming .] [ Middle English amen , aimen , eimen , to guess at, to estimate, to aim, Old French esmer , asmer , from Latin aestimare to estimate; or perhaps from Old French aesmer ; ... (L. ad ) + esmer . See Estimate .]
1. To point or direct a missile weapon, or a weapon which propels as missile, towards an object or spot with the intent of hitting it; as, to aim at a fox, or at a target.

2. To direct the indention or purpose; to attempt the accomplishment of a purpose; to try to gain; to endeavor; -- followed by at , or by an infinitive; as, to aim at distinction; to aim to do well.

Aim'st thou at princes?
Pope.

3. To guess or conjecture. [ Obsolete] Shak.

Aim transitive verb To direct or point, as a weapon, at a particular object; to direct, as a missile, an act, or a proceeding, at, to, or against an object; as, to aim a musket or an arrow, the fist or a blow ( at something); to aim a satire or a reflection ( at some person or vice).

Aim noun [ Confer Old French esme estimation, from esmer . See Aim , intransitive verb ]
1. The pointing of a weapon, as a gun, a dart, or an arrow, in the line of direction with the object intended to be struck; the line of fire; the direction of anything, as a spear, a blow, a discourse, a remark, towards a particular point or object, with a view to strike or affect it.

Each at the head leveled his deadly aim .
Milton.

2. The point intended to be hit, or object intended to be attained or affected.

To be the aim of every dangerous shot.
Shak.

3. Intention; purpose; design; scheme.

How oft ambitious aims are crossed!
Pope.

4. Conjecture; guess. [ Obsolete]

What you would work me to, I have some aim .
Shak.

To cry aim (Archery) , to encourage. [ Obsolete] Shak.

Syn. -- End; object; scope; drift; design; purpose; intention; scheme; tendency; aspiration.

Aimer noun One who aims, directs, or points.

Aimless adjective Without aim or purpose; as, an aimless life. -- Aim"less*ly , adverb -- Aim"less*ness , noun

Ain't A contraction for are not and am not ; also used for is not . [ Colloq. or illiterate speech]. See An't .

Aino noun [ Said to be the native name for man.] One of a peculiar race inhabiting Yesso, the Kooril Islands etc., in the northern part of the empire of Japan, by some supposed to have been the progenitors of the Japanese. The Ainos are stout and short, with hairy bodies.

Air (âr) noun [ Middle English air , eir , French air , Latin aër , from Greek 'ah`r , air, mist, for 'aϝhr , from root 'aϝ to blow, breathe, probably akin to English wind . In sense 10 the French has taking a meaning from Italian aria atmosphere, air, from the same Latin word; and in senses 11, 12, 13 the French meaning is either from Latin aria , or due to confusion with French aire , in an older sense of origin, descent. Confer Aëry , Debonair , Malaria , Wind .]
1. The fluid which we breathe, and which surrounds the earth; the atmosphere. It is invisible, inodorous, insipid, transparent, compressible, elastic, and ponderable.

» By the ancient philosophers, air was regarded as an element; but modern science has shown that it is essentially a mixture of oxygen and nitrogen, with a small amount of carbon dioxide, the average proportions being, by volume: oxygen, 20.96 per cent.; nitrogen, 79.00 per cent.; carbon dioxide, 0.04 per cent. These proportions are subject to a very slight variability. Air also always contains some vapor of water.

2. Symbolically: Something unsubstantial, light, or volatile. "Charm ache with air ." Shak.

He was still all air and fire.
[ Air and fire being the finer and quicker elements as opposed to earth and water .] Macaulay .

3. A particular state of the atmosphere, as respects heat, cold, moisture, etc., or as affecting the sensations; as, a smoky air , a damp air , the morning air , etc.

4. Any aëriform body; a gas; as, oxygen was formerly called vital air . [ Obsolete]

5. Air in motion; a light breeze; a gentle wind.

Let vernal airs through trembling osiers play.
Pope.

6. Odoriferous or contaminated air.

7. That which surrounds and influences.

The keen, the wholesome air of poverty.
Wordsworth.

8. Utterance abroad; publicity; vent.

You gave it air before me.
Dryden.

9. Intelligence; information. [ Obsolete] Bacon.

10. (Mus.) (a) A musical idea, or motive , rhythmically developed in consecutive single tones, so as to form a symmetrical and balanced whole, which may be sung by a single voice to the stanzas of a hymn or song, or even to plain prose, or played upon an instrument; a melody; a tune; an aria. (b) In harmonized chorals, psalmody, part songs, etc., the part which bears the tune or melody -- in modern harmony usually the upper part -- is sometimes called the air .

11. The peculiar look, appearance, and bearing of a person; mien; demeanor; as, the air of a youth; a heavy air ; a lofty air . "His very air ." Shak.

12. Peculiar appearance; apparent character; semblance; manner; style.

It was communicated with the air of a secret.
Pope.

12. plural An artificial or affected manner; show of pride or vanity; haughtiness; as, it is said of a person, he puts on airs . Thackeray.

14. (Paint.) (a) The representation or reproduction of the effect of the atmospheric medium through which every object in nature is viewed. New Am. Cyc. (b) Carriage; attitude; action; movement; as, the head of that portrait has a good air . Fairholt.

15. (Man.) The artificial motion or carriage of a horse.

» Air is much used adjectively or as the first part of a compound term. In most cases it might be written indifferently, as a separate limiting word, or as the first element of the compound term, with or without the hyphen; as, air bladder, air -bladder, or air bladder; air cell, air -cell, or air cell; air -pump, or air pump.

Air balloon . See Balloon . -- Air bath . (a) An apparatus for the application of air to the body. (b) An arrangement for drying substances in air of any desired temperature. -- Air castle . See Castle in the air , under Castle . -- Air compressor , a machine for compressing air to be used as a motive power. -- Air crossing , a passage for air in a mine. -- Air cushion , an air-tight cushion which can be inflated; also, a device for arresting motion without shock by confined air. -- Air fountain , a contrivance for producing a jet of water by the force of compressed air. -- Air furnace , a furnace which depends on a natural draft and not on blast. -- Air line , a straight line; a bee line. Hence Air-line , adj. ; as, air-line road. -- Air lock (Hydr. Engin.) , an intermediate chamber between the outer air and the compressed-air chamber of a pneumatic caisson. Knight. -- Air port (Nav.) , a scuttle or porthole in a ship to admit air. -- Air spring , a spring in which the elasticity of air is utilized. -- Air thermometer , a form of thermometer in which the contraction and expansion of air is made to measure changes of temperature. -- Air threads , gossamer. -- Air trap , a contrivance for shutting off foul air or gas from drains, sewers, etc.; a stench trap. -- Air trunk , a pipe or shaft for conducting foul or heated air from a room. -- Air valve , a valve to regulate the admission or egress of air; esp. a valve which opens inwardly in a steam boiler and allows air to enter. -- Air way , a passage for a current of air; as the air way of an air pump; an air way in a mine. -- In the air . (a) Prevalent without traceable origin or authority, as rumors. (b) Not in a fixed or stable position; unsettled. (c) (Mil.) Unsupported and liable to be turned or taken in flank; as, the army had its wing in the air . -- To take air , to be divulged; to be made public. -- To take the air , to go abroad; to walk or ride out.

Air (âr) transitive verb [ imperfect & past participle Aired (ârd); present participle & verbal noun Airing .] [ See Air , noun , and confer Aërate .]
1. To expose to the air for the purpose of cooling, refreshing, or purifying; to ventilate; as, to air a room.

It were good wisdom . . . that the jail were aired .
Bacon.

Were you but riding forth to air yourself.
Shak.

2. To expose for the sake of public notice; to display ostentatiously; as, to air one's opinion.

Airing a snowy hand and signet gem.
Tennyson.

3. To expose to heat, for the purpose of expelling dampness, or of warming; as, to air linen; to air liquors.

Air bed A sack or matters inflated with air, and used as a bed.

Air bladder
1. (Anat.) An air sac, sometimes double or variously lobed, in the visceral cavity of many fishes. It originates in the same way as the lungs of air-breathing vertebrates, and in the adult may retain a tubular connection with the pharynx or esophagus.

2. A sac or bladder full of air in an animal or plant; also an air hole in a casting.

Air brake (Machinery) A railway brake operated by condensed air. Knight.

Air brush A kind of atomizer for applying liquid coloring matter in a spray by compressed air.

Air cell
1. (Botany) A cavity in the cellular tissue of plants, containing air only.

2. (Anat.) A receptacle of air in various parts of the system; as, a cell or minute cavity in the walls of the air tubes of the lungs; the air sac of birds; a dilatation of the air vessels in insects.

Air chamber
1. A chamber or cavity filled with air, in an animal or plant.

2. A cavity containing air to act as a spring for equalizing the flow of a liquid in a pump or other hydraulic machine.

Air cock A faucet to allow escape of air.