/ Dictionary / Index E equation of time: Meaning and Definition of Find definitions for: equa'tion of time' Pronunciation: [key] — Astron. Astron. apparent time minus mean solar time, ranging from minus 14 minutes in February to over 16 minutes in November. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. equation of state equator Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language