/ Dictionary / Index U unlawful: Meaning and Definition of Find definitions for: un•law•ful Pronunciation: (un-lô'ful), [key] — adj. not lawful; contrary to law; illegal. born out of wedlock; illegitimate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unlawful (Thesaurus) unlatch unlax Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language