Umpire (noun)

1. A person who is authorized to make decisions on matters of play in a sports match.
2. A person chosen to settle a dispute or decide a question.

Origin:

Early 17th century: from french nonper "not equal", from non "not" + par "equal", from latin par.

Examples:

1. The umpire made the call that the runner was safe at first base.
2. The umpire's decision was final and could not be appealed.
3. The umpire has the power to eject players from the game for unsportsmanlike behavior.
4. The umpire signaled that the pitch was a strike.
5. The umpire's job is to enforce the rules of the game and make fair and impartial decisions.