adj. 1. Sleepy; drowsy. 2. a. Suggestive of or resembling sleep: a slumberous torpor. b. Quiet; tranquil. 3. Causing or inducing sleep; soporific. slumber·ous·ly adv. slumber·ous·ness n. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.