The term derives from the Old French nonper, non, 'not' and per, 'equal': 'one who is requested to act as arbiter of a dispute between two people'[1] (as evidenced in cricket, where dismissal decisions can only be made on appeal).
The word was applied to the officials of many sports including baseball, association football (where it has been superseded by assistant-referee) and cricket (which still uses it).
Each match is controlled by two such umpires, where it is ty In cricket, dismissal decisions can only be made on appeal by the players.
In the game of netball, the match at hand is presided over by two umpires, typically female, with a comprehensive knowledge of the rules.
In a regatta an umpire is the on-the-water official appointed to enforce the rules of racing and to ensure safety.