(sports) A clock, especially in American football, that operates continuously in a one-sided game, so as to hasten the end of the contest.

Alternative spelling of clock-watcher

A person who is eager for time to pass (e.g., at work or school), especially when faced with an undesirable task.

All day and night; all of the time.

continuous; incessant; without interruption; all day long, 24 hours per day; nonstop: from the concept that it happens while the hands of the clock go all the way around.

An extremely accurate reference clock whose operation is based on an atomic process, typically the frequency of electromagnetic radiation associated with a specified energy-level transition in an element such as cesium.

(Britain) A single stem of a dandelion in its post-flowering state with the downy covering of its head intact. The term is applied when the flower is used, or is thought of as suitable for use, in a children's pastime by which the number of puffs needed to blow the filamentous achenes from a dandelion is supposed to tell the time.

An alarm clock that includes a radio; a radio alarm clock

(biology) Any of several mechanisms that regulate the periodicity of biological functions. / The progression from puberty to menopause during which a woman can bear children.

A clock built into a case.