(Christianity) The days leading up to the second coming of the Messiah (Christ), when the world will be judged. / (Islam) The days leading to the coming of the Mahdi.

The time for which a vehicle or machine is out of service for repair. / The time spent by a foundry or machine shop to make a custom item.

(informal, intransitive) To engage in an activity whose only purpose is to make the time seem to pass more quickly; to fill the time between activities.

A range of longitudes where a common standard time is used.

(firearms) The time, usually measured in milliseconds, from when the trigger is pulled until the firing pin strikes the primer.

The highest, or most prestigious level in any field, especially in entertainment.

(informal) By a large margin; with great significance.

(idiomatic) right now, or in the near and foreseeable future

(slang) A critical period of time during which it is necessary to work hard and fast. / (basketball) The last few minutes of play in the fourth quarter.

(physics) The slowing of the passage of time experienced by objects in motion relative to an observer; measurable only at relativistic speeds.