n 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
n a timepiece that shows the time of day
v measure the time or duration of an event or action or the person who performs an action in a certain period of time
n. 钟表;时钟(clock的复数)