1. (noun)decree, edict, fiat, order, rescript a legally binding command or decision entered on the court record (as if issued by a court or judge)
"a friend in New Mexico said that the order caused no trouble out there"
2. (verb)decree issue a decree
"The King only can decree"
3. (verb)rule, decree decide with authority
"The King decreed that all firstborn males should be killed"