A day on which ordinary occupations (of an individual or a community) are suspended; a day of exemption or cessation from work; a day of…

A day given over to festivity, recreation, or play; a holiday. Formerly also (Scottish): †a school holiday (obsolete).

At Oxford and Cambridge Universities: designating a day of rest, a holiday. Cf. non dis., adj.

a full (working) day observed or given as a holiday; cf. half-holiday, n. 2.

A day spent in or set aside for rest, esp. as an interlude between periods of activity.

colloquial. Sunday out: a Sunday, typically one each month, on which a domestic servant is free.

a day away from work, school, service, etc.; a day of rest or holiday.

an evening spent away from home in social or leisure pursuits; cf. out, adv. 14b(b).

a day on which colliers stop work.

In phrases denoting an evening spent socializing or at leisure. night off: an evening or night free from work or from a person's usual duties.

In phrases denoting an evening spent socializing or at leisure. night out: (originally) the evening on which a domestic servant was free to go out…

U.S. regional, South African, and Indian English. A period off work, esp. a day off. See sense D. 4a.