Definition of deontic
: of or relating to moral obligation : deontological
Origin and Etymology of deontic
Greek deont-, deon that which is obligatory, from neuter of present participle of dein to lack, be needful — more at deuter-
First Known Use: 1951
Seen and Heard
What made you want to look up deontic? Please tell us where you read or heard it (including the quote, if possible).