/ Dictionary / Index G good day: Meaning and Definition of Find definitions for: good" day' Pronunciation: [key] a conventional expression used at meeting or parting during the daytime. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Good Conduct Medal good egg Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language