In the context of professional wrestling, a pinfall is scored when a wrestler pins his opponent's shoulders to the mat for a count of three, in such matches where pinfalls are scored. (Matches such as, but not limited to, I-Quit matches and submission matches do not allow for pinfalls.)
A pinfall usually signifies the end of a match (when pinfalls are allowed), except in the case of Iron Man matches , in which the winner must score the highest number of decisions in an alloted time.