ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: Middle English night cappe, from night (I) + cappe cap
1.
a. : a cloth cap worn with nightclothes
b. or nightcap wig archaic : a close-fitting wig
2. : a cloud resting about the summit of a mountain or hill
3. : something usually soporific (as hot cocoa or toddy) taken at bedtime
4. : the final race or contest of a day's sports ; especially : the final game of a baseball doubleheader