/ Dictionary / Index D dilate: Meaning and Definition of Find definitions for: di•late Pronunciation: (dī-lāt', di-, dī'lāt), [key] — v., -lat•ed, -lat•ing. —v.t. to make wider or larger; cause to expand. to describe or develop at length. —v.i. to spread out; expand. to speak or write at length; expatiate (often fol. by on or upon). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dilate (Thesaurus) dilatation dilation 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