Adj. | 1. | slumbrous - quiet and tranquil; "a slumberous June morning" |
2. | slumbrous - inclined to or marked by drowsiness; "slumberous (or slumbrous) eyes"; "`slumbery' is archaic"; "the sound had a somnolent effect" asleep - in a state of sleep; "were all asleep when the phone rang"; "fell asleep at the wheel" |