clock clock /ˈklɑːk/

noun

1. () A timepiece that shows the time of day  ( clock )
   a timepiece that shows the time of day
    The clock on the wall shows that it's already past noon
   The clock on the wall shows that it's already past noon
   
   

verb

1. () Measure the time or duration of an event or action or the person who performs an action in a certain period of time  ( clock , time )
   measure the time or duration of an event or action or the person who performs an action in a certain period of time
    He clocked the runners
   he clocked the runners