D defs.my
Entry 2 senses Webster, 1913

Devolution

/dĕvˌ-əl-o͞osh'-ən/ · Dev·o·lu·tion · IPA /diːvəˈluːʃən/
01 n. The act of rolling down.
  1. 1.
    The act of rolling down.[R.]
    “The devolution of earth down upon the valleys.” Woodward.
  2. 2.
    Transference from one person to another; a passing or devolving upon a successor.
    “The devolution of the crown through a . . . channel known and conformable to old constitutional requisitions.” De Quincey.