noun1. the act, fact, or result of devolving
 2. a passing onwards or downwards from one stage to another
 3.   another word for degeneration (sense 3)
4. a transfer or allocation of authority, esp from a central government to regional governments or particular interests
   Word origin
C16: from Medieval Latin 
dēvolūtiō a rolling down, from Latin 
dēvolvere to roll down, sink into; see 
devolve