important (adj.) Look up important at
mid-15c., from Middle French important and directly from Medieval Latin importantem (nominative importans) "important, momentous," present-participle adjective from importare "be significant in," from Latin importare "bring in, convey, bring in from abroad," from assimilated form of in- "into, in" (see in- (2)) + portare "to carry," from PIE root *per- (2) "to lead, pass over." Meaning "pretentious, pompous" is from 1713. Related: Importantly.