A day of vacation; a day when one does not attend work, school etc(noun)
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Use "day off" in a sentence
"“Surely ye had a day off sometimes at the St. Paul Deptford manor?”"
"Taking this into consideration, Kang & Lee created an ad revolving around a Japanese expatriate family: a Japanese businessman takes the day off work, choosing instead to “telecommunicate” from home, because his wife is ill, and he wishes to take care of her."
"Meanwhile, the press in New Hampshire rarely let the story take a day off to relax, because when they did, the head of the New Hampshire Democratic Party, Kathy Sullivan, made them put the thing back to work again by asking all the right questions—“Who knew what?”"