Obsolete form of o'clock.

simple past tense and past participle of clock out

simple past tense and past participle of clock up

A longcase clock.

A clock with an alarm that can be set to sound at a determined time.

A clock used to time a game.

(duration, idiomatic) All the time, or seemingly all the time; constantly.

(idiomatic) Alternative form of around-the-clock.

Alternative form of round the clock (“darts game”)

A form of bracket clock with a balloon-shaped case.