Ignaro, ig-nā′rō, n. (Spens.) an ignorant person. [It.,—L. ignarus. See Ignore.]

Ignatian, ig-nā′shan, adj. of or pertaining to St Ignatius, Bishop of Antioch, martyred at Rome under Trajan about 110 A.D.—The famous Ignatian Epistles exist in 3 different forms or recensions—the Short (3 only, in Syriac); the Middle (7, the Greek text first published in 1646—considered by Zahn and Lightfoot to be the original form); the Long (these 7, together with 6 others).

Igneous, ig′ne-us, adj. pertaining to, consisting of, or like fire: (geol.) produced by the action of fire.—adjs. Ignesc′ent, emitting sparks of fire; Ignif′erous, bearing fire; Ignig′enous, engendered in fire.—Igneous rocks, those which have been erupted from the heated interior of the earth—hence also termed Eruptive rocks. [L. igneusignis, fire.]

Ignipotent, ig-nip′o-tent, adj. (Pope) presiding over fire. [L. ignis, fire, potens, -entis, powerful.]

Ignis-fatuus, ig′nis-fat′ū-us, n. a light which misleads travellers, often seen over marshy places, also called 'Will-o'-the-Wisp:'—pl. Ignes-fatui (ig′nēz-fat′ū-ī). [L. ignis, fire, fatuus, foolish.]

Ignite, ig-nīt′, v.t. to set on fire, to kindle: to render luminous with heat.—v.i. to take fire: to burn.—n. Ignitibil′ity.—adj. Ignīt′ible, that may be ignited.—n. Igni′tion, act of setting on fire: state of being kindled, and esp. of being made red hot. [L. ignīre, ignītum, to set on fire—ignis, fire.]

Ignoble, ig-nō′bl, adj. of low birth: mean or worthless: dishonourable.—v.i. to degrade.—ns. Ignobil′ity, Ignō′bleness.—adv. Ignō′bly. [Fr.,—L. ignobilisin, not, gnobilis, nobilis, noble.]

Ignominy, ig′nō-min-i, n. the loss of one's good name: public disgrace: infamy—formerly also Ig′nomy.—adj. Ignomin′ious, dishonourable: marked with ignominy: contemptible: mean.—adv. Ignomin′iously.—n. Ignomin′iousness. [Fr.,—L. ignominiain, not, gnomen, nomen, name.]

Ignoramus, ig-nō-rā′mus, n. the word formerly written by a grand-jury on the back of an indictment, meaning that they rejected it: an ignorant person, esp. one making a pretence to knowledge:—pl. Ignorā′muses. [L., 'We are ignorant,' 1st pers. pl. pres. indic. of ignorāre.]

Ignorant, ig′nō-rant, adj. without knowledge: uninstructed: unacquainted with: resulting from want of knowledge: (Shak.) unconscious: (Shak.) undiscovered.—n. Ig′norance, state of being ignorant: want of knowledge—in R.C. theol. vincible or wilful ignorance is such as one might be fairly expected to overcome, hence it can never be an excuse for sin, whether of omission or of commission; while invincible ignorance, which a man could not help or abate, altogether excuses from guilt: (pl.) in Litany, sins committed through ignorance.—adv. Ig′norantly.—n. Ignorā′tion. [Fr.,—L. ignorans, -antis, pr.p. of ignorāre. See Ignore.]