/ Dictionary / Index P portamento: Meaning and Definition of Find definitions for: por•ta•men•to Pronunciation: (pôr"tu-men'tō, pōr"-It.pôr"tä-men'tô), [key] — pl. -ti -tos. a passing or gliding from one pitch or tone to another with a smooth progression. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. portal vein portance Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language