Z

1. The exact time when an attack or other military action is supposed to start.

/Zero hour for the bombers to take off was midnight./

2. The time when an important decision or change is supposed to come; the time for a dangerous ...

1. To adjust a gun so that it will exactly hit (a target); aim at.

/Big guns were zeroed in on the enemy fort./

/American missiles have been zeroed in on certain targets, to be fired if necessary./

2. {slang} To give your full ...

See:

[BUTTON ONE'S LIP].

A defense in a sport (as basketball or football) in which each player has to defend a certain area.

* /The coach taught his team a zone defense because he thought his players weren't fast enough to defend against individual ...

1. To fall asleep very quickly.

/Can I talk to Joe? — Call back tomorrow, he zonked out./

2. To pass out from fatigue, or alcohol.

/You won't get a coherent word out of Joe, he has zonked out./

1. To rapidly close in on (said of airplanes and birds of prey).

/The fighter planes zoomed in on the enemy target./

2. To make a closeup of someone or something with a camera.

* /The photographer zoomed in on the tiny colibri ...