From Longman Dictionary of Contemporary Englishnightlightnight‧light /ˈnaɪtlaɪt/ noun [countable] DHFDHBa small electric light that you put in a child’s room at night
Examples from the Corpus
nightlight• Wind more jewellery wire in a circle around nightlight.• Carefully she drew it out through the folds of the eiderdown and held it close to the flame of the nightlight. 