Also found in: Thesaurus.
n. pl. might-have-beens (-bĭnz′)
An event that could have but never did occur: "This is one of the great might-have-beens of modern history" (Arthur M. Schlesinger, Jr.).
that which might have occurred if it were not for other eventssomeone who may have been important or may have done certain things if it were not for other events