(Australian rules football) A match official who decides when the ball has over the boundary line (out of bounds), and whether it was on the full from a kick. (Under the rules as of 2007, a free kick results from on the full, or a throw-in otherwise.)

plural of third umpire

plural of goal umpire

plural of boundary umpire

(tennis) The official who sits in the umpire chair, who is the main authority during a match

(tennis) line judge

plural of chair umpire

plural of line umpire

(cricket) The umpire who stands at or near square leg to rule on decisions at the batsman's end of the wicket. In some circumstances, the umpire may stand at the equivalent position on the opposite side of the batsman (between gully and point), but is still referred to as the square leg umpire in these circumstances.

plural of square leg umpire