/ Dictionary / Index G gyrus: Meaning and Definition of Find definitions for: gy•rus Pronunciation: ( jī'rus), [key] — pl. gy•ri a convolution, esp. of the brain. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gyrus (Thesaurus) gyrovague GySgt Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language