/ Dictionary / Index U unfamiliar: Meaning and Definition of Find definitions for: un•fa•mil•iar Pronunciation: (un"fu-mil'yur), [key] — adj. not familiar; not acquainted with or conversant about: to be unfamiliar with a subject. different; unaccustomed; unusual; strange: an unfamiliar treat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unfamiliar (Thesaurus) unfaithful unfasten Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language