1. soft caps worn in bed to keep the head warm while sleeping
Usage: historical; dated
2. alcoholic drinks consumed before going to bed
Usage: informal

Examples

• Victorian women often wore lace nightcaps to bed.
• The old man pulled his woolen nightcap over his ears.
• They enjoyed brandy nightcaps by the fireplace.
• The hotel bar served nightcaps until midnight.
• She offered her guests whiskey nightcaps before they retired.
• Traditional nightcaps were made of cotton or linen.
• The couple shared wine nightcaps on their anniversary.