We found one dictionary that defines the word sleep box:

General (1 matching dictionary)

1. Sleep box: Wikipedia, the Free Encyclopedia

▸ Words similar to sleep box ▸ Usage examples for sleep box ▸ Idioms related to sleep box ▸ Wikipedia articles (New!) ▸ Words that often appear near sleep box ▸ Rhymes of sleep box ▸ Invented words related to sleep box