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.

(physics) Alternative form of spacetime

(sports, UK) An additional period played at the end of a game if the score is tied after the standard allocation of time.

At the last possible moment; just before or within the assigned time.

(idiomatic) temporarily; for now; until later; until the situation changes; in an indefinite period of time.

(astronomy) The local time based on a solar day - the mean time between successive noons.