Referee
A referee or simply ref is the person of authority in a variety of sports who is responsible for presiding over the game from a neutral point of view and making on-the-fly decisions that enforce the rules of the sport, including sportsmanship decisions such as ejection. The official tasked with this job may be known, in addition to referee, by a variety of other titles as well (often depending on the sport), including umpire, judge, arbiter, arbitrator, linesman, commissaire, timekeeper, touch judge or Technical Official (by the International Olympic Committee).
Umpire (noun)
The official who presides over a tennis game sat on a high chair.
Umpire (noun)
One of the two white-coated officials who preside over a cricket match.
Umpire (noun)
One of usually 4 officials who preside over a baseball game.
“The umpire called the pitch a strike.”
Umpire (noun)
The official who stands behind the line on the defensive side.
“The umpire must keep on his toes as the play often occurs around him.”
Umpire (noun)
A match official on the ground deciding and enforcing the rules during play. As of 2007 the Australian Football League uses 3, or in the past 2 or just 1. The other officials, the goal umpires and boundary umpires, are normally not called just umpires alone.
Umpire (noun)
A person who arbitrates between contending parties.
Umpire (noun)
The official who presides over a curling game.
Umpire (verb)
To act as an umpire in a game.
Umpire (verb)
To decide as an umpire; to arbitrate; to settle (a dispute, etc.).
Referee (noun)
An umpire or judge; the official who makes sure the rules are followed during a game.
“The referee kicked Jim out of the game for fighting.”
Referee (noun)
A person who settles a dispute.
Referee (noun)
A person who writes a letter of reference or provides a reference by phone call for someone.
“Your application, along with letters from three referees, should be received by January 31.”
Referee (noun)
An expert who judges the manuscript of an article or book to decide if it should be published.
Referee (verb)
To act as a referee.
“He has to referee three hockey games this weekend.”
“She has to finish refereeing an article for Nature.”
Umpire (noun)
(in some sports) an official who watches a game or match closely to enforce the rules and arbitrate on matters arising from the play.
Umpire (noun)
a person chosen to arbitrate between contending parties.
Umpire (verb)
act as an umpire in a game or match
“he could be seen regularly umpiring for the club”
“he umpired the World Cup final”