timer

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. a timepiece that measures a time interval and signals its end (Freq. 1)
• Derivationally related forms:
time
• Hypernyms:
timepiece, timekeeper, horologe
• Hyponyms:
chronograph, parking meter, stopwatch, stop watch
2. (sports) an official who keeps track of the time elapsed
• Syn:
timekeeper
• Derivationally related forms:
time
• Topics:
sport, athletics
• Hypernyms:
official
3. a regulator that activates or deactivates a mechanism at set times
• Derivationally related forms:
time
• Hypernyms:
governor, regulator