Verb

1. To repeatedly hit a person
2. To hit so they become unconscious (knocked out)

   I'm going to punch out that SOB and leave him laying on the ground bleeding.

3. To use a punch to remove a piece of material or to remove a piece already scored.

   I spent all day punching out the die cut decals.

4. To eject from an airplane.

   With the engine on fire he had to punch out and hit the silk.

5. To rule (by an umpire) that a pitch is a called third strike, often done emphatically.

   The ump punched out the batter with relish to close out the game.

6. To throw a called third strike.

   Jones punched out the batter to start in the sixth.

Verb

1. To leave a workplace by punching a timecard

   I'm going to punch out a bit early today.

Noun

1. An instance of a called third strike.

   Jones' punch out happened with the bases juiced.