An umpire's job is to make certain that the rules of a game are obeyed and to make judgments about whether particular actions are acceptable. A referee is the person who is in charge of a game on the field and who makes certain that the rules are followed. If there is a disagreement on whether rules have been followed, the referee goes to the umpire for a decision.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.