/ Dictionary / Index A adiabatic: Meaning and Definition of Find definitions for: ad•i•a•bat•ic Pronunciation: (ad"ē-u-bat'ik, ā"dī-u-), [key] — adj. occurring without gain or loss of heat (opposed to diabatic): an adiabatic process. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: adiabatic (Thesaurus) adiabat adiabatic chart Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language