What does the word clock mean?

Usage examples for clock

  1. The clock struck twelve; then one; then two; and then she slept. – John March, Southerner by George W. Cable
  2. Mary looked at the clock. – The Story of a Doctor's Telephone--Told by His Wife by Ellen M. Firebaugh
  3. There was no answer except from the clock, with its whisper of Death and Death. – Carnival by Compton Mackenzie