Meaning

• An instrument used to measure or keep track of time; a non-portable timepiece.

• The odometer of a motor vehicle.

  "This car has over 300,000 miles on the clock."

• An electrical signal that synchronizes timing among digital circuits of semiconductor chips or modules.

• The seed head of a dandelion.

• A time clock.

  "I can't go off to lunch yet: I'm still on the clock."

• A CPU clock cycle, or T-state.

Meaning

• To measure the duration of.

• To measure the speed of.

  "He was clocked at 155 miles per hour."

• To hit (someone) heavily.

  "When the boxer let down his guard, his opponent clocked him."

• To take notice of; to realise; to recognize someone or something

  "A trans person may be able to easily clock other trans people."

• To falsify the reading of the odometer of a vehicle.

  "I don't believe that car has done only 40,000 miles. It's been clocked."

• To beat a video game.

  "Have you clocked that game yet?"