(military) A fast marching pace of 120 thirty-inch steps per minute.

A personification of time as an old man, usually carrying an hourglass.

(set phrase) Time is an essential consideration (in regard to an action or response); haste is necessary.

(hydrology) The average time for which a particular molecule of water will remain in a body of water.

(astronomy) Time measured by the apparent diurnal motion of the vernal equinox; approximated by that based on the rotation of planet Earth relative to the seemingly fixed stars.

(intransitive, military) To march at double time. / (transitive, military) To order troops to march at double time.

(idiomatic) Purposefully cause a delay, in order to achieve something else.

(shortened form) time and tide wait for no man

(mathematics) A characteristic of an exponential function, represented by τ in the function:

(statistics) A set of data points, each of which represents the value of the same variable at different times, normally at uniform intervals.