Breadcrumb Home > 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: ultimathule Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language