the interval before the evening meal during which cocktails and other alcoholic beverages are often served.
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Origin of cocktail hour
First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for cocktail hour
They found a table at the rear of the room, out of the worst of the cocktail-hour uproar.Little Fuzzy|Henry Beam Piper