O
- offensive foul
- A foul committed by a member of the team playing offense.
- one-and-one
- (NCAA and NFHS) A free-throw attempt which, if made, allows the player a second free-throw attempt. See also bonus.
- one trillion
- A box score showing one minute played and zero for all other statistics, resulting in a one followed by twelve zeros – the conventional American rendering of "one trillion."
- outlet pass
- A pass thrown by a rebounder to start a fast break.
- over-and-back
- See backcourt violation (1).
- over the back
- a foul committed by a player who tries to rebound the ball by pushing, moving or climbing on a player's back who is already in position to rebound the ball.
- overtime
- when the score is tied at the end of regulation play, the teams play a five-minute overtime period.
Read more about this topic: Glossary Of Basketball Terms