free from the duty of watching or keeping guard.

Designating a period or occasion when a person is not at work, on duty, at his or her business, at school, etc., or when normal activity…

Of the nature of a Sabbath or period of rest.

on duty: engaged in the performance of one's appointed office, service, or task. off duty: the opposite of this; not officially engaged.

Not in actual or regular use at the time spoken of, but carried, held, or kept in reserve for future… colloquial. Of persons: off-duty, idle (cf. (…