noun
(clothing) A warm cloth cap worn while sleeping, often with pajamas, being common attire in northern Europe before effective home heating became widespread.
A beverage drunk before bed that is usually alcoholic.
(by extension, figuratively) Something that a person reads or listens to before bed.
(US, sports, baseball) The final match of a sporting contest, especially the second game of a baseball doubleheader.
(historical) A cap drawn over the face of the condemned person before they are hanged.
verb
(intransitive) To drink an alcoholic beverage shortly before retiring to bed.