ig·nite / igˈnīt/ • v. catch fire or cause to catch fire: [intr.] furniture can give off lethal fumes when it ignites | [tr.] sparks flew out and ignited the dry scrub. ∎ [tr.] fig. arouse (an emotion): the words ignited new fury in him. ∎ [tr.] fig. inflame or instigate (a situation): they were about to ignite the European socialist revolution.DERIVATIVES: ig·nit·a·bil·i·ty / igˌnītəˈbilitē/ n.ig·nit·a·ble adj.