Definition from Wiktionary, the free dictionary
- (US) A form of baseball, played by young children, in which the batter hits a ball placed on a tee rather than being thrown by a pitcher.
- His dad found that the store-bought baseball stand broke every time the bat hit the tee, but using a medium sized pylon let the kids play a full game of T-ball without any fuss.
- (US) The lightweight wiffleball used to play a game of tee ball.
- OED 2006