ˌrefrəˈnāshən noun
( -s )
Etymology: Middle English refrenacion, from Latin refrenation-, refrenatio, from refrenatus (past participle of refrenare to restrain, from re- + frenare to bridle, restrain, from frenum bridle) + -ion-, -io -ion — more at frenum
1. obsolete : the act of restraining or refraining
2. : the failure of an expected planetary aspect to occur because one of the planets becomes retrograde