noun A warm cloth cap worn while sleeping, often with pajamas, being common attire in northern Europe before effective home heating became widespread. .mw-parser-output .defdate{font-size:smaller}
Winston wore a nightcap to stave off the cold.
noun A beverage drunk before bed that is usually alcoholic.
I'll make myself a nightcap of whisky and lemon before heading to bed.
noun Something that a person reads or listens to before bed.
noun The final match of a sporting contest, especially the second game of a baseball doubleheader.
noun A cap drawn over the face of the condemned person before they are hanged.
verb To drink an alcoholic beverage shortly before retiring to bed.