from
The Collaborative International Dictionary of English v.0.48
Obvention \Ob*ven"tion\, n. [L. obvention, fr. obvenire to come
before or in the way of, to befall; ob (see {Ob-}) + venire
to come: cf. F. obvention.]
The act of happening incidentally; that which happens
casually; an incidental advantage; an occasional offering.
[Obs.] "Tithes and other obventions." --Spenser.
[1913 Webster]
Legacies bequeathed by the deaths of princes and great
persons, and other casualities and obventions.
--Fuller.
[1913 Webster]