To open the mouth involuntarily through drowsiness, dullness, or fatigue; to gape; to oscitate.
- To open the mouth wide with a deep inhalation, usually involuntarily from drowsiness, fatigue, or boredom.
- To open wide; gape: The chasm yawned at our feet.
- To utter wearily, while or as if while yawning: yawned his disapproval of the silly venture.
- The act of yawning.
- A fatigued or bored response.
- Informal One that provokes yawns; a bore: The movie was nothing more than one big yawn.