/ Dictionary / Index D dateless: Meaning and Definition of Find definitions for: date•less Pronunciation: (dāt'lis), [key] — adj. without a date; undated. endless; limitless. so old as to be undatable: a dateless rock formation. of permanent interest regardless of age: a dateless work of art. having no social engagement. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dateless (Thesaurus) dated date line Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language