(historical) a person employed to read the time over a phone line / A service provided by telephone companies where people can get the time by phoning a certain number.

Alternative form of grandfather clock / (card games) A form of patience in which cards are laid out in an arrangement resembling a clock face.

plural of alarm clock

plural of clock face

Biological clock.

plural of grandfather's clock

plural of grandfather clock

A metaphorical clock representing when one is expected to die, e.g. when someone expects to have a short lifespan because of an illness.

plural of balloon clock

plural of game clock