1. n. a bed. I was so tired I could hardly find my sack.
2. tv. to dismiss someone from employment; to fire someone. If I do that again, they’ll sack me.
3. and the sack n. a dismissal. (Always with the in this sense.) The boss gave them all the sack.
4. tv. in football, to tackle the quarterback behind the line of scrimmage. I tried to sack him, but he was too fast.
5. n. the completion of a tackle in football. Andy made the sack on the ten-yard line.