/ Dictionary / Index E expertise: Meaning and Definition of Find definitions for: ex•per•tise Pronunciation: (ek"spur-tēz'), [key] — n. expert skill or knowledge; expertness; know-how: business expertise. a written opinion by an expert, as concerning the authenticity or value of a work of art, manuscript, etc. ex•pert•ise Pronunciation: (ek'spur-tīz"), [key] — -ised, -ising. expertize. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: expertise (Thesaurus) expert expertism Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language