A penalty is a punishment:
*a legal Sentence (law), e.g. the death penalty
*used in the plural, penalties or sanctions, with the more restricted meaning of punishment for violating rules of procedure, or for abusing the judicial process.
*in sports; for example, in football (soccer) there is a penalty area, otherwise known as the 'eighteen-yard box' due to its size. Penalty kick (soccer) are taken from the penalty spot, twelve yards from the centre of the goal-line.
* penalty (rugby)