decreer|dɪˈkriːə(r)| [-er1.] One who decrees. 1660H. More Myst. Godl. vii. ii. 283 The word naturally signifies a Commander or Decreer.1664― Myst. Iniq. 285 A Decreer of Idolatrous practices.a1679T. Goodwin Wks. I. iii. 103 (R.), The first decreer of it.