/ Dictionary / Index D dilative: Meaning and Definition of Find definitions for: di•la•tive Pronunciation: (dī-lā'tiv, di-, dī'lā-), [key] — adj. serving or tending to dilate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dilation dilatometer Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language