n A round or irregular patch on the surface of a thing having a different color, texture etc. and generally round in shape.
n (context|gymnastics|dance|weightlifting) One who spots (supports or assists a maneuver, or is prepared to assist if safety dictates); a spotter
v (context|gymnastics|dance|weightlifting) To support or assist a maneuver, or to be prepared to assist if safety dictates.