/ Dictionary / Index M mean solar day: Meaning and Definition of Find definitions for: mean' so'lar day' Pronunciation: [key] day (def. 3a). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Means grass mean solar time Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language