any incidental occurrence or advantage
• (n.) The act of happening incidentally; that which happens casually; an incidental advantage; an occasional offering.
Ob·ven'tion noun [ Latin obvention , from obvenire to come before or in the way of, to befall; ob (see Ob- ) + venire to come: confer French obvention .] The act of happening incidentally; that which happens casually; an incidental advantage; an occasional of...