tee

Concise Oxford English Dictionary © 2008 Oxford University Press:
tee1

▶noun

• 1 a cleared space on a golf course, from which the ball is struck at the beginning of play for each hole.

• 2 a small peg with a concave head which is placed in the ground to support a golf ball before it is struck from a tee.

• 3 a mark aimed at in bowls, quoits, curling, and other similar games.

▶verb (tees, teeing, teed) Golf

• 1 (usu. tee up) place the ball on a tee ready to make the first stroke of the round or hole.

• 2 (tee off) begin a round or hole of golf by playing the ball from a tee.

– origin C17 (orig. Scots, as teaz): of unknown origin.

Concise Oxford English Dictionary © 2008 Oxford University Press:
tee2

▶noun informal a T-shirt.