/ Dictionary / Index G guppy: Meaning and Definition of Find definitions for: gup•py Pronunciation: (gup'ē), [key] — pl. -pies. a small, freshwater topminnow, Poecilia reticulata, often kept in aquariums. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: guppy (Thesaurus) Guo Moruo Gupta Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language