n. a play in which the team receiving a punt behind its own goal line is unable or unwilling to carry the ball back into the field of play, thus conceding a point to the opposition.
1958  Gary Shreider kicked two converts and Ron Quillian booted a single.
1966  Capozzi listed seven major rules differences between the Canadian and the U.S. games [including] single point if punt not run out of end zone. . . .