Part 366

In`va*lid"i*ty (?), n. [Cf. F. invalidité, LL. invaliditas want of health.]

1. Want of validity or cogency; want of legal force or efficacy; invalidness; as, the invalidity of an agreement or of a will.

2. Want of health; infirmity. [Obs.] Sir W. Temple.

In*val"id*ness (?), n. Invalidity; as, the invalidness of reasoning.

In*val"or*ous (?), a. Not valorous; cowardly.

In*val"u*a*ble (?), a. Valuable beyond estimation; inestimable; priceless; precious.

In*val"u*a*bly, adv. Inestimably. Bp. Hall.

In*val"ued (?), a. Inestimable. [R.] Drayton.

In*va`ri*a*bil"i*ty (?), n. [Cf. F. invariabilité.] The quality of being invariable; invariableness; constancy; uniformity.

In*va"ri*a*ble (?), a. [Pref. in- not + variable: cf. F. invariable.] Not given to variation or change; unalterable; unchangeable; always uniform.

Physical laws which are invariable.

I. Taylor.

-- In*va"ri*a*ble*ness, n. -- In*va"ri*a*bly, adv.

In*va"ri*a*ble (?), n. (Math.) An invariable quantity; a constant.

In*va"ri*ance (?), n. (Math.) The property of remaining invariable under prescribed or implied conditions. J. J. Sylvester.

In*va"ri*ant (?), n. (Math.) An invariable quantity; specifically, a function of the coefficients of one or more forms, which remains unaltered, when these undergo suitable linear transformations. J. J. Sylvester.

In*va"sion (?), n. [L. invasio: cf. F. invasion. See Invade.]

1. The act of invading; the act of encroaching upon the rights or possessions of another; encroachment; trespass.

2. A warlike or hostile entrance into the possessions or domains of another; the incursion of an army for conquest or plunder.

3. The incoming or first attack of anything hurtful or pernicious; as, the invasion of a disease.

Syn. -- Invasion, Irruption, Inroad. Invasion is the generic term, denoting a forcible entrance into a foreign country. Incursion signifies a hasty and sudden invasion. Irruption denotes particularly violent invasion. Inroad is entry by some unusual way involving trespass and injury.

In*va"sive (?), a. [LL. invasivus: cf. F. invasif. See Invade.] Tending to invade; characterized by invasion; aggressive. "Invasive war." Hoole.

In*vect" (?), v. i. To inveigh. [Obs.] Beau. & Fl.

In*vec"ted (?), a. [L. invectus carried in. See Inveigh.] (Her.) Having a border or outline composed of semicircles with the convexity outward; -- the opposite of engrailed.

In*vec"tion (?), n. [L. invectio. See Inveigh.] An inveighing against; invective. [Obs.] Fulke.

In*vec"tive (?), a. [L. invectivus: cf. F. invectif. See Inveigh.] Characterized by invection; critical; denunciatory; satirical; abusive; railing.

In*vec"tive, n. [F. invective.] An expression which inveighs or rails against a person; a severe or violent censure or reproach; something uttered or written, intended to cast opprobrium, censure, or reproach on another; a harsh or reproachful accusation; -- followed by against, having reference to the person or thing affected; as, an invective against tyranny.

The world will be able to judge of his [Junius'] motives for writing such famous invectives.