A moment (of time).

(physics) Alternative form of time dilation (less common)

(mathematics, physics) Determined by the value of a variable representing time.

(mathematics, physics) Not time-dependent; not determined by the value of a variable representing time.

the present time

(ergodic theory) The average (if it exists) of a function over iterations of T, a measure-preserving transformation on a measure space, starting from some initial point x.

The difference between one measurement of time and another; the length of a time interval. / The difference in clock time between two or more different time zones.

A period of time with fixed, well-defined limits.

A numeric code generated at regular intervals by a timing system.

(mathematics, physics) The set of values, representing time, over which a function dependent on time is defined.