The noun decree has 1 sense (first 1 from tagged texts)
1. (4) 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")
Overview of verb decree
The verb decree has 2 senses (first 1 from tagged texts)
1. (2) decree -- (issue a decree; "The King only can decree")
2. rule, decree -- (decide with authority; "The King decreed that all firstborn males should be killed")