/ Dictionary / Index P pesto: Meaning and Definition of Find definitions for: pes•to Pronunciation: (pes'tō), [key] — n. Italian Cookery. a sauce typically made with basil, pine nuts, olive oil, and grated Parmesan blended together and served hot or cold over pasta, fish, or meat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pesto (Thesaurus) pestle pet 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