/ Dictionary / Index D deontology: Meaning and Definition of Find definitions for: de•on•tol•o•gy Pronunciation: (dē"on-tol'u-jē), [key] — n. ethics, esp. that branch dealing with duty, moral obligation, and right action. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. deontological ethics deorbit Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language