/ Dictionary / Index G gismo: Meaning and Definition of Find definitions for: gis•mo Pronunciation: (giz'mō), [key] — pl. -mos. a gadget or device: What is this gismo supposed to do? Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gismo (Thesaurus) Gish Gissing Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language