Real Dictionary

tee
countable noun: In golf, a tee is a small piece of wood or plastic which is used to support the ball before it is hit at the start of each hole.
countable noun: On a golf course, a tee is one of the small flat areas of ground from which people hit the ball at the start of each hole.

TEE in American English
Trans-Europe Express

tee in American English 1
the letter T
noun: the letter T or t

tee in American English 2
a mark aimed at in quoits, curling, etc.
noun: the starting place, usually a hard mound of earth, at the beginning of play for each hole
transitive verb: to place (the ball) on a tee

tee in American English 3
a small, cone-shaped mound as of sand, on which a golf ball was placed to be driven
to place (a ball) on a tee

tee in British English 1
noun: a pipe fitting in the form of a letter T, used to join three pipes

tee in British English 2
noun: an area, often slightly elevated, from which the first stroke of a hole is made
verb: to position (the ball) ready for striking, on or as if on a tee

tee in British English 3
noun: a mark used as a target in certain games such as curling and quoits