What is the meaning of clocks?

noun

• A timepiece that shows the time of day.
  • synonyms: clock
• European weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight up; often grown for forage.
  • synonyms: redstem storksbill, alfilaria, alfileria, filaree, filaria, pin grass, pin clover, Erodium cicutarium

verb

• Measure the time or duration of an event or action or the person who performs an action in a certain period of time.
  • usage: "he clocked the runners"
  • synonyms: clock, time