noun

1. a device used for measuring and indicating time, usually by means of pointers moving over a dial: clocks, unlike watches, are not meant to be worn or carried about
2. ☆ time clock
3. a measuring or recording device suggestive of a clock, as a taximeter

Etymology: ME clokke, orig., clock with bells < ML clocca, bell < Celt, as in OIr cloc (> OE clugge, OHG glocka), bell < ? IE base *kel-, to cry out, sound > clamor

transitive verb

1. to measure the speed or record the time of (a race, runner, motorist, etc.) with a stopwatch or other timing device
2. to measure (work done, distance covered, etc.) with a registering device