noun

• (attributive) A common noun relating to an instrument that measures or keeps track of time.
  "A 12-hour clock system; an antique clock sale; Acme is a clock manufacturer."
• (British) The odometer of a motor vehicle.
  "This car has over 300,000 miles on the clock."
• (electronics) An electrical signal that synchronizes timing among digital circuits of semiconductor chips or modules.
• (computing, informal) A CPU clock cycle, or T-state.
  "Executing a NEXT to code takes 7 clocks, or 1.05 microseconds."

verb

• (transitive) To measure the duration of.
• (transitive) To measure the speed of.
  "He was clocked at 155 miles per hour."
• (transitive, slang) To hit (someone) heavily.
  "When the boxer let down his guard, his opponent clocked him."
• (transitive, informal) To notice; to take notice of (someone or something).
  "Clock the wheels on that car!"

verb

• (transitive) To ornament (e.g. the side of a stocking) with figured work.

verb

• (Scotland, intransitive, dated) To make the sound of a hen; to cluck.
• (Scotland, intransitive, dated) To hatch.