(archaic) Alternative form of curiosity killed the cat / Too much worry leads to burden.

One should not be curious about things that can be dangerous.

plural of kill file

(military, slang) The damage inflicted by a weapon on a vehicle that destroys its weapon systems, or substantially reduces its ability to deliver weapons accurately, but does not significantly affect its ability to move.

The act of being idle.

present participle of kill time

A security measure used to switch off a device in an emergency.

(military, slang) An attack or damage inflicted by a weapon that does not destroy a military vehicle but results in it taking no further part in its intended mission.

(military, slang) The damage inflicted by a weapon on a vehicle that immobilises it, but does not totally destroy it, leaving the vehicle's crew able to use its weapons. Typically this term is used to refer to tanks and other armoured fighting vehicles that have their engines, tracks, or running gear damaged.

(US) that part of a slaughterhouse where the animals are killed and initial processing is carried out.