/ Dictionary / Index G Gila: Meaning and Definition of Find definitions for: Gi•la Pronunciation: (hē'lu), [key] — n. a river flowing W from SW New Mexico across S Arizona to the Colorado River. 630 mi. (1015 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gila (Thesaurus) Gil Gila monster Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language