nightcap /ˈnaɪtˌkæp/ noun plural nightcaps
plural nightcaps
Learner's definition of NIGHTCAP
[count]
1
: a drink that you have just before you go to bed at night and that usually has alcohol in it睡前饮料（通常含酒精）
2
: a cloth cap that people used to wear in bed in the past（旧时的）睡帽