D defs.my
Entry 1 sense Webster, 1913

Obvention

· Ob·ven·tion · IPA /ɒbˈvɛnʃən/
01 n. The act of happening incidentally; that which happens casually; an incidental advantage; an occasional offering.
  1. 1.
    The act of happening incidentally; that which happens casually; an incidental advantage; an occasional offering.[Obs.]
    “Legacies bequeathed by the deaths of princes and great persons, and other casualities and obventions.” Fuller.