1. past tense of clonk; to hit with a dull heavy sound
Usage: informal
2. past tense of clonk; to make a dull heavy sound
Usage: informal
3. past tense of clonk; to fall asleep suddenly
Usage: informal; often with ‘out’

Examples

• The baseball clonked him on the head.
• She clonked the hammer against the nail.
• The heavy book clonked onto the floor.
• The old car engine clonked loudly.
• He clonked out on the couch after dinner.
• The gate clonked shut behind us.