nighttime /ˈnaɪtˌtaɪm/adjective 2noun 1forms 1 adjective2 •Pertaining to nighttime; appropriate to the night. •Happening during the night.Discourage nighttime prowlers by installing motion-sensitive lights. — 2008 noun1 •The hours of darkness between sunset and sunrise; the night.Nighttime fell like the opening / In the final act of the beginning of time — 1986 formsnighttimes
