Webster's Dictionary, 1913

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Impulse noun [ Latin impulsus , from impellere . See Impel .]


1. The act of impelling, or driving onward with sudden force; impulsion; especially, force so communicated as to produced motion suddenly, or immediately.

All spontaneous animal motion is performed by mechanical impulse .
S. Clarke.

2. The effect of an impelling force; motion produced by a sudden or momentary force.

3. (Mech.) The action of a force during a very small interval of time; the effect of such action; as, the impulse of a sudden blow upon a hard elastic body.

4. A mental force which simply and directly urges to action; hasty inclination; sudden motive; momentary or transient influence of appetite or passion; propension; incitement; as, a man of good impulses ; passion often gives a violent impulse to the will.

These were my natural impulses for the undertaking.
Dryden.

Syn. -- Force; incentive; influence; motive; feeling; incitement; instigation.

Impulse transitive verb [ See Impel .] To impel; to incite. [ Obsolete] Pope.

Impulsion noun [ Latin impulsio : confer French impulsion . See Impel .]


1. The act of impelling or driving onward, or the state of being impelled; the sudden or momentary agency of a body in motion on another body; also, the impelling force, or impulse. "The impulsion of the air." Bacon.

2. Influence acting unexpectedly or temporarily on the mind; sudden motive or influence; impulse. "The impulsion of conscience." Clarendon. "Divine impulsion prompting." Milton.

Impulsive adjective [ Confer French impulsif .]


1. Having the power of driving or impelling; giving an impulse; moving; impellent.

Poor men! poor papers! We and they
Do some impulsive force obey.
Prior.

2. Actuated by impulse or by transient feelings.

My heart, impulsive and wayward.
Longfellow.

3. (Mech.) Acting momentarily, or by impulse; not continuous; -- said of forces.

Impulsive noun That which impels or gives an impulse; an impelling agent. Sir W. Wotton.

Impulsively adverb In an impulsive manner.

Impulsiveness noun The quality of being impulsive.

Impulsor noun [ Latin ] One who, or that which, impels; an inciter. [ R.] Sir T. Browne.

Impunctate adjective Not punctate or dotted.

Impunctual adjective [ Prefix im- not + punctual : confer French imponctuel .] Not punctual. [ R.]

Impunctuality noun Neglect of, or failure in, punctuality. [ R.] A. Hamilton.

Impune adjective [ Latin impunis .] Unpunished. [ R.]

Impunibly adverb Without punishment; with impunity. [ Obsolete] J. Ellis.

Impunity noun [ Latin impunitas , from impunis without punishment; prefix im- not + poena punishment: confer French impunité . See Pain .] Exemption or freedom from punishment, harm, or loss.

Heaven, though slow to wrath,
Is never with impunity defied.
Cowper.

The impunity and also the recompense.
Holland.

Impuration noun Defilement; obscuration. [ Obsolete] Bp. Hall.

Impure adjective [ Latin impurus ; prefix im- not + purus pure: confer French impur . See Pure .]


1. Not pure; not clean; dirty; foul; filthy; containing something which is unclean or unwholesome; mixed or impregnated extraneous substances; adulterated; as, impure water or air; impure drugs, food, etc.

2. Defiled by sin or guilt; unholy; unhallowed; -- said of persons or things.

3. Unchaste; lewd; unclean; obscene; as, impure language or ideas. " Impure desires." Cowper.

4. (Script.) Not purified according to the ceremonial law of Moses; unclean.

5. (Language) Not accurate; not idiomatic; as, impure Latin; an impure style.

Impure transitive verb To defile; to pollute. [ Obsolete] Bp. Hall.

Impurely adverb In an impure manner.

Impureness noun The quality or condition of being impure; impurity. Milton.

Impurity noun ; plural Impurities . [ Latin impuritas : confer French impureté .]


1. The condition or quality of being impure in any sense; defilement; foulness; adulteration.

Profaneness, impurity , or scandal, is not wit.
Buckminster.

2. That which is, or which renders anything, impure; foul matter, action, language, etc.; a foreign ingredient.

Foul impurities reigned among the monkish clergy.
Atterbury.

3. (Script.) Want of ceremonial purity; defilement.

Impurple transitive verb [ imperfect & past participle Impurpled ; present participle & verbal noun Impurpling .] [ Prefix im- in + purple . Confer Empurple .] To color or tinge with purple; to make red or reddish; to purple; as, a field impurpled with blood.

Impurpled with celestial roses, smiled.
Milton.

The silken fleece impurpled for the loom.
Pope.

Imputability noun The quality of being imputable; imputableness.

Imputable adjective [ Confer French imputable .]


1. That may be imputed; capable of being imputed; chargeable; ascribable; attributable; referable.

A prince whose political vices, at least, were imputable to mental incapacity.
Prescott.

2. Accusable; culpable. [ R.]

The fault lies at his door, and she is no wise imputable .
Ayliffe.

Imputableness noun Quality of being imputable.

Imputably adverb By imputation.

Imputation [ Latin imputatio an account, a charge: confer French imputation .]


1. The act of imputing or charging; attribution; ascription; also, anything imputed or charged.

Shylock . Antonio is a good man.
Bassanio . Have you heard any imputation to the contrary?
Shak.

If I had a suit to Master Shallow, I would humor his men with the imputation of being near their master.
Shak.

2. Charge or attribution of evil; censure; reproach; insinuation.

Let us be careful to guard ourselves against these groundless imputation of our enemies.
Addison.

3. (Theol.) A setting of something to the account of; the attribution of personal guilt or personal righteousness of another; as, the imputation of the sin of Adam, or the righteousness of Christ.

4. Opinion; intimation; hint.

Imputative adjective [ Latin imputativus : confer French imputatif .] Transferred by imputation; that may be imputed. -- Im*put"a*tive*ly , adverb

Actual righteousness as well as imputative .
Bp. Warburton.

Impute transitive verb [ imperfect & past participle Imputed ; present participle & verbal noun Imputing .] [ French imputer , Latin imputare to bring into the reckoning, charge, impute; prefix im- in + putare to reckon, think. See Putative .]


1. To charge; to ascribe; to attribute; to set to the account of; to charge to one as the author, responsible originator, or possessor; -- generally in a bad sense.

Nor you, ye proud, impute to these the fault,
If memory o'er their tomb no trophies raise.
Gray.

One vice of a darker shade was imputed to him - - envy.
Macaulay.

2. (Theol.) To adjudge as one's own (the sin or righteousness) of another; as, the righteousness of Christ is imputed to us.

It was imputed to him for righteousness .
Rom. iv. 22.

They merit
Imputed shall absolve them who renounce
Their own, both righteous and unrighteous deeds.
Milton.

3. To take account of; to consider; to regard. [ R.]

If we impute this last humiliation as the cause of his death.
Gibbon.

Syn. -- To ascribe; attribute; charge; reckon; consider; imply; insinuate; refer. See Ascribe .

Imputer noun One who imputes.

Imputrescible adjective [ Prefix im- + putrescible : confer French imputrescible .] Not putrescible.

Imrigh noun [ Scot.; Gael. eun- bhrigh chicken soup.] A peculiar strong soup or broth, made in Scotland. [ Written also imrich .]

In preposition [ Anglo-Saxon in ; akin to D. & German in , Icelandic ī , Swedish & Danish i , OIr. & Latin in , Greek 'en . √197. Confer 1st In- , Inn .] The specific signification of in is situation or place with respect to surrounding, environment, encompassment, etc. It is used with verbs signifying being, resting, or moving within limits, or within circumstances or conditions of any kind conceived of as limiting, confining, or investing, either wholly or in part. In its different applications, it approaches some of the meanings of, and sometimes is interchangeable with, within , into , on , at , of , and among . It is used: --


1. With reference to space or place; as, he lives in Boston; he traveled in Italy; castles in the air.

The babe lying in a manger.
Luke ii. 16.

Thy sun sets weeping in the lowly west.
Shak.

Situated in the forty-first degree of latitude.
Gibbon.

Matter for censure in every page.
Macaulay.

2. With reference to circumstances or conditions; as, he is in difficulties; she stood in a blaze of light. "Fettered in amorous chains." Shak.

Wrapt in sweet sounds, as in bright veils.
Shelley.

3. With reference to a whole which includes or comprises the part spoken of; as, the first in his family; the first regiment in the army.

Nine in ten of those who enter the ministry.
Swift.

4. With reference to physical surrounding, personal states, etc., abstractly denoted; as, I am in doubt; the room is in darkness; to live in fear.

When shall we three meet again,
In thunder, lightning, or in rain?
Shak.

5. With reference to character, reach, scope, or influence considered as establishing a limitation; as, to be in one's favor. " In sight of God's high throne." Milton.

Sounds inharmonious in themselves, and harsh.
Cowper.

6. With reference to movement or tendency toward a certain limit or environment; -- sometimes equivalent to into ; as, to put seed in the ground; to fall in love; to end in death; to put our trust in God.

He would not plunge his brother in despair.
Addison.

She had no jewels to deposit in their caskets.
Fielding.

7. With reference to a limit of time; as, in an hour; it happened in the last century; in all my life.

In as much as , or Inasmuch as , in the degree that; in like manner as; in consideration that; because that; since. See Synonym of Because , and confer For as much as , under For , preposition -- In that , because; for the reason that. "Some things they do in that they are men . . . ; some things in that they are men misled and blinded with error." Hooker. -- In the name of , in behalf of; on the part of; by authority; as, it was done in the name of the people; -- often used in invocation, swearing, praying, and the like. -- To be in for it . (a) To be in favor of a thing; to be committed to a course. (b) To be unable to escape from a danger, penalty, etc. [ Colloq.] -- To be (or keep ) in with . (a) To be close or near; as, to keep a ship in with the land. (b) To be on terms of friendship, familiarity, or intimacy with; to secure and retain the favor of. [ Colloq.]

Syn. -- Into; within; on; at. See At .

In adverb
1. Not out; within; inside. In , the preposition, becomes an adverb by omission of its object, leaving it as the representative of an adverbial phrase, the context indicating what the omitted object is; as, he takes in the situation ( i. e. , he comprehends it in his mind); the Republicans were in ( i. e. , in office); in at one ear and out at the other ( i. e. , in or into the head); his side was in ( i. e. , in the turn at the bat); he came in ( i. e. , into the house).

Their vacation . . . falls in so pat with ours.
Lamb.

» The sails of a vessel are said, in nautical language, to be in when they are furled, or when stowed.

In certain cases in has an adjectival sense; as, the in train ( i. e. , the incoming train); compare up grade, down grade, under tow, after thought, etc.

2. (Law) With privilege or possession; -- used to denote a holding, possession, or seisin; as, in by descent; in by purchase; in of the seisin of her husband. Burrill.

In and in breeding . See under Breeding . -- In and out (Nautical) , through and through; -- said of a through bolt in a ship's side. Knight. -- To be in , to be at home; as, Mrs. A. is in . -- To come in . See under Come .

In noun [ Usually in the plural.]
1. One who is in office; -- the opposite of out .

2. A reëntrant angle; a nook or corner.

Ins and outs , nooks and corners; twists and turns.

All the ins and outs of this neighborhood.
D. Jerrold.

In transitive verb To inclose; to take in; to harvest. [ Obsolete]

He that ears my land spares my team and gives me leave to in the crop.
Shak.

In and in adjective & adverb Applied to breeding from a male and female of the same parentage. See under Breeding .

In antis [ Latin ] (Architecture) Between antæ; -- said of a portico in classical style, where columns are set between two antæ, forming the angles of the building. See Anta .

In commendam [ See Commendam .] (Law) See Commendam , and Partnership in Commendam , under Partnership .

In esse [ Latin ] In being; actually existing; - - distinguished from in posse , or in potentia , which denote that a thing is not, but may be.

In loco [ Latin ] In the place; in the proper or natural place.

In posse [ Latin ] In possibility; possible, although not yet in existence or come to pass; -- contradistinguished from in esse .

In rem [ Latin ] (Law) Lit., in or against a (or the) thing; -- used: (a) Of any right (called right, or jus , in rem ) of such a nature as to be available over its subject without reference to one person more than another, or, as generally expressed, a right competent, or available, against all persons. Rights in rem include not alone rights over physical property, but all rights available against all persons indifferently, as those of life, liberty, and reputation. (b) Of actions for recovering or reducing to possession or enjoyment a specific object, as in the enforcement of maritime liens against a vessel, which is made the defendant by a sort of personification. Most actions for the specific recovery of property in English and American law are in the nature of actions in personam against a person alleged to be unlawfully withholding the property.

In situ [ Latin ] In its natural position or place; -- said of a rock or fossil, when found in the situation in which it was originally formed or deposited.

In situ [ Latin ] In its natural or original position or place; in position; -- said specif., in geology, of a rock, soil, or fossil, when in the situation in which it was originally formed or deposited.

In transitu [ Latin ] (Law) In transit; during passage; as, goods in transitu .

In vacuo [ Latin ] (Physics) In a vacuum; in empty space; as, experiments in vacuo .

In- [ See In , preposition Confer Em- , En- .] A prefix from Eng. preposition in , also from Lat. preposition in , meaning in , into , on , among ; as, in bred, in born, in road; in cline, in ject, in trude. In words from the Latin, in- regularly becomes il- before l , ir- before r , and im- before a labial; as, il lusion, ir ruption, im blue, im migrate, im part. In- is sometimes used with an simple intensive force.

In- [ Latin in -; akin to English un -. See Un- .] An inseparable prefix, or particle, meaning not , non -, un- as, in active, in capable, in apt. In- regularly becomes il- before l , ir- before r , and im- before a labial.

Inability noun [ Prefix in- not + ability : confer French inhabileté . See Able , and confer Unable .] The quality or state of being unable; lack of ability; want of sufficient power, strength, resources, or capacity.

It is not from an inability to discover what they ought to do, that men err in practice.
Blair.

Syn. -- Impotence; incapacity; incompetence; weakness; powerlessness; incapability. See Disability .

Inable transitive verb See Enable .