Definition of overcall:
(v) :
(poker, bridge) To call a bet after another player has already called
(n) :
(poker, bridge) A call which occurs after another player has already called
(v) :
(medicine) To diagnose a condition that does not, in fact, exist.
(n) :
(medicine) A positive diagnosis when there is, in fact, nothing wrong.
(n) :
(contract law) An additional contribution required of investors beyond the initial investment, should unforeseen expenses arise.
(n) :
An extra amount called up beyond the minimum required.