Any timepiece that makes use of the piezoelectric property of a quartz crystal.

(military) A technique of timing the delivery of fires by placing all units on a common time. The synchronized clock uses a specific hour and minute based on either local or universal time. Local time is established using the local time zone.

(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