Webster's Dictionary, 1913

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Idoloclast noun [ Greek ... idol + ... to break.] A breaker of idols; an iconoclast.

Idolographical adjective [ Idol + -graph .] Descriptive of idols. [ R.] Southey.

Idolous adjective Idolatrous. [ Obsolete] Bale.

Idolum I*do"lon noun ; plural Idola . [ Latin See Idol ; confer Eidolon .] Appearance or image; a phantasm; a spectral image; also, a mental image or idea.

Idoneous adjective [ Latin idoneus .] Appropriate; suitable; proper; fit; adequate. [ R.]

An ecclesiastical benefice . . . ought to be conferred on an idoneous person.

Idorgan noun [ Greek ... form + English organ .] (Biol.) A morphological unit, consisting of two or more plastids, which does not possess the positive character of the person or stock, in distinction from the physiological organ or biorgan . See Morphon .

Idrialine, Idrialite noun [ Confer French idrialine .] (Min.) A bituminous substance obtained from the mercury mines of Idria , where it occurs mixed with cinnabar.

Idumean adjective Of or pertaining to ancient Idumea , or Edom, in Western Asia. -- noun An inhabitant of Idumea, an Edomite.

Idyl noun [ Latin idyllium , Greek ..., from ... form; literally, a little form of image: confer French idylle . See Idol .] A short poem; properly, a short pastoral poem; as, the idyls of Theocritus; also, any poem, especially a narrative or descriptive poem, written in an eleveted and highly finished style; also, by extension, any artless and easily flowing description, either in poetry or prose, of simple, rustic life, of pastoral scenes, and the like. [ Written also idyll .]

Wordsworth's solemn-thoughted idyl .
Mrs. Browning.

His [ Goldsmith's] lovely idyl of the Vicar's home.
F. Harrison.

Idyllic adjective Of or belonging to idyls.

If conj. [ Middle English if , gif , Anglo-Saxon gif ; akin to OFries. ief , gef , ef , Old Saxon ef , of , Dutch of , or, whether, if, German ob whether, if, Old High German oba , ibu , Icelandic ef , Goth. iba , ibai , an interrogative particle; properly a case form of a noun meaning, doubt (cf. Old High German iba doubt, condition, Icelandic if , ef , ifi , efi ), and therefore orig. meaning, on condition that.]
1. In case that; granting, allowing, or supposing that; -- introducing a condition or supposition.

Tisiphone, that oft hast heard my prayer,
Assist, if Œdipus deserve thy care.

If thou be the Son of God, command that these stones be made bread.
Matt. iv. 3.

2. Whether; -- in dependent questions.

Uncertain if by augury or chance.

She doubts if two and two make four.

As if , But if . See under As , But .

Ifere adjective [ Corrupted from in fere .] Together. [ Obsolete] Chaucer.

Igasuric adjective [ See Igasurine .] (Chemistry) Pertaining to, or obtained from, nux vomica or St. Ignatius's bean; as, igasuric acid.

Igasurine noun [ Malay igasura the nux vomica.] (Chemistry) An alkaloid found in nux vomica, and extracted as a white crystalline substance.

Igloo noun
1. An Eskimo snow house.

2. (Zoology) A cavity, or excavation, made in the snow by a seal, over its breathing hole in the ice.

Ignatius bean (Botany) See Saint Ignatius's bean , under Saint .

Igneous adjective [ Latin igneus , from ignis fire; allied to Sanskrit agni , Lithuanian ugnis , OSlav. ogne .]
1. Pertaining to, having the nature of, fire; containing fire; resembling fire; as, an igneous appearance.

2. (Geol.) Resulting from, or produced by, the action of fire; as, lavas and basalt are igneous rocks.

Ignescent adjective [ Latin ignescens , present participle of ignescere to become inflamed, from ignis fire: confer French ignescent .] Emitting sparks of fire when struck with steel; scintillating; as, ignescent stones.

Ignicolist noun [ Latin ignis fire + colere to worship.] A worshiper of fire. [ R.]

Igniferous adjective [ Latin ignifer ; ignis fire + ferre to bear.] Producing fire. [ R.] Blount.

Ignifluous adjective [ Latin ignifluus ; ignis fire + fluere to flow.] Flowing with fire. [ Obsolete] Cockerman.

Ignify transitive verb [ imperfect & past participle Ignified ; present participle & verbal noun Ignifying .] [ Latin ignis fire + -fy .] To form into fire. [ R.] Stukeley.

Ignigenous adjective [ Latin ignigenus ; ignis fire + genere , ginere , to beget, produce.] Produced by the action of fire, as lava. [ R.]

Ignipotence noun Power over fire. [ R.]

Ignipotent adjective [ Latin ignipotens ; ignis fire + potens powerful.] Presiding over fire; also, fiery.

Vulcan is called the powerful ignipotent .

Ignis fatuus ; plural Ignes fatui . [ Latin ignis fire + fatuus foolish. So called in allusion to its tendency to mislead travelers.]
1. A phosphorescent light that appears, in the night, over marshy ground, supposed to be occasioned by the decomposition of animal or vegetable substances, or by some inflammable gas; -- popularly called also Will-with-the-wisp , or Will-o'-the-wisp , and Jack-with-a-lantern , or Jack-o'-lantern .

2. Fig.: A misleading influence; a decoy.

Scared and guided by the ignis fatuus of popular superstition.
Jer. Taylor.

Ignite transitive verb [ imperfect & past participle Ignited ; present participle & verbal noun Igniting .] [ Latin ignitus , past participle of ignire to ignite, from ignis fire. See Igneous .]
1. To kindle or set on fire; as, to ignite paper or wood.

2. (Chemistry) To subject to the action of intense heat; to heat strongly; -- often said of incombustible or infusible substances; as, to ignite iron or platinum.

Ignite intransitive verb To take fire; to begin to burn.

Ignitible adjective Capable of being ignited.

Ignition noun [ Confer French ignition .]
1. The act of igniting, kindling, or setting on fire.

2. The state of being ignited or kindled. Sir T. Browne.

Ignitor noun One who, or that which, produces ignition; especially, a contrivance for igniting the powder in a torpedo or the like. [ Written also igniter .]

Ignivomous adjective [ Latin ignivomus ; ignis fire + vomere 8vomit.] Vomiting fire. [ R.]

Ignobility noun [ Latin ignobilitas : confer French ignobilité .] Ignobleness. [ Obsolete] Bale.

Ignoble adjective [ Latin ignobilis ; prefix in- not + nobilis noble: confer French ignoble . See In- not, and Noble , adjective ]
1. Of low birth or family; not noble; not illustrious; plebeian; common; humble.

I was not ignoble of descent.

Her royal stock graft with ignoble plants.

2. Not honorable, elevated, or generous; base.

'T is but a base, ignoble mind,
That mounts no higher than a bird can soar.

Far from the madding crowd's ignoble strife.

3. (Zoology) Not a true or noble falcon; -- said of certain hawks, as the goshawk.

Syn. -- Degenerate; degraded; mean; base; dishonorable; reproachful; disgraceful; shameful; scandalous; infamous.

Ignoble transitive verb To make ignoble. [ Obsolete] Bacon.

Ignobleness noun State or quality of being ignoble.

Ignobly adverb In an ignoble manner; basely.

Ignominious adjective [ Latin ignominiosus : confer French ignominieux .]
1. Marked with ignominy; incurring public disgrace; dishonorable; shameful.

Then first with fear surprised and sense of pain,
Fled ignominious .

2. Deserving ignominy; despicable.

One single, obscure, ignominious projector.

3. Humiliating; degrading; as, an ignominious judgment or sentence. Macaulay.

Ignominiously adverb In an ignominious manner; disgracefully; shamefully; ingloriously.

Ignominy noun ; plural Ignominies . [ Latin ignominia ignominy ( i.e. , a deprivation of one's good name); in- not + nomen name: confer French ignominie . See In- not, and Name .]
1. Public disgrace or dishonor; reproach; infamy.

Their generals have been received with honor after their defeat; yours with ignominy after conquest.

Vice begins in mistake, and ends in ignominy .

Ignominy is the infliction of such evil as is made dishonorable, or the deprivation of such good as is made honorable by the Commonwealth.

2. An act deserving disgrace; an infamous act.

Syn. -- Opprobrium; reproach; dishonor.

Ignomy noun Ignominy. [ R. & Obsolete]

I blush to think upon this ignomy .

Ignoramus noun [ Latin , we are ignorant. See Ignore .]
1. (Law) We are ignorant; we ignore; -- being the word formerly written on a bill of indictment by a grand jury when there was not sufficient evidence to warrant them in finding it a true bill. The phrase now used is, "No bill," "No true bill," or "Not found," though in some jurisdictions "Ignored" is still used. Wharton (Law Dict. ). Burn.

2. (pl. Ignoramuses ) A stupid, ignorant person; a vain pretender to knowledge; a dunce.

An ignoramus in place and power.

Ignorance noun [ French, from Latin ignorantia .]
1. The condition of being ignorant; the want of knowledge in general, or in relation to a particular subject; the state of being uneducated or uninformed.

Ignorance is the curse of God,
Knowledge the wing wherewith we fly to heaven.

2. (Theol.) A willful neglect or refusal to acquire knowledge which one may acquire and it is his duty to have. Book of Common Prayer.

Invincible ignorance (Theol.) , ignorance beyond the individual's control and for which, therefore, he is not responsible before God.

Ignorant adjective [ French, from Latin ignorans , -antis , present participle of ignorare to be ignorant. See Ignore .]
1. Destitute of knowledge; uninstructed or uninformed; untaught; unenlightened.

He that doth not know those things which are of use for him to know, is but an ignorant man, whatever he may know besides.

2. Unacquainted with; unconscious or unaware; -- used with of .

Ignorant of guilt, I fear not shame.

3. Unknown; undiscovered. [ Obsolete]

Ignorant concealment.

Alas, what ignorant sin have I committed?

4. Resulting from ignorance; foolish; silly.

His shipping,
Poor ignorant baubles! -- on our terrible seas,
Like eggshells moved.

Syn. -- Uninstructed; untaught; unenlightened; uninformed; unlearned; unlettered; illiterate. -- Ignorant , Illiterate . Ignorant denotes want of knowledge, either as to single subject or information in general; illiterate refers to an ignorance of letters, or of knowledge acquired by reading and study. In the Middle Ages, a great proportion of the higher classes were illiterate , and yet were far from being ignorant , especially in regard to war and other active pursuits.

In such business
Action is eloquence, and the eyes of the ignorant
More learned than the ears.

In the first ages of Christianity, not only the learned and the wise, but the ignorant and illiterate , embraced torments and death.

Ignorant noun A person untaught or uninformed; one unlettered or unskilled; an ignoramous.

Did I for this take pains to teach
Our zealous ignorants to preach?

Ignorantism noun The spirit of those who extol the advantage of ignorance; obscurantism.

Ignorantist noun One opposed to the diffusion of knowledge; an obscurantist.

Ignorantly adverb In a ignorant manner; without knowledge; inadvertently.

Whom therefoer ye ignorantly worship, him declare I unto you.
Acts xvii. 23.

Ignore transitive verb [ imperfect & past participle Ignored ; present participle & verbal noun Ignoring .] [ Latin ignorare ; prefix in- not + the root of gnarus knowing, noscere to become acquainted with. See Know , and confer Narrate .]
1. To be ignorant of or not acquainted with. [ Archaic]

Philosophy would solidly be established, if men would more carefully distinguish those things that they know from those that they ignore .

2. (Law) To throw out or reject as false or ungrounded; -- said of a bill rejected by a grand jury for want of evidence. See Ignoramus .

3. Hence: To refuse to take notice of; to shut the eyes to; not to recognize; to disregard willfully and causelessly; as, to ignore certain facts; to ignore the presence of an objectionable person.

Ignoring Italy under our feet,
And seeing things before, behind.
Mrs. Browning.

Ignoscible adjective [ Latin ignoscibilis , from ignoscere to pardon, lit., not to wish to know; prefix in- not + gnoscere , noscere , to learn to know. See In- not, and Know .] Pardonable. [ Obsolete] Bailey.