/ Dictionary / Index U unessential: Meaning and Definition of Find definitions for: un•es•sen•tial Pronunciation: (un"u-sen'shul), [key] — adj. not of prime importance; not indispensable. —n. an unessential thing; nonessential. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unessential (Thesaurus) UNESCO unestablished Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language