Also found in: Dictionary, Thesaurus.
1. to stop working or fail suddenly My radio conked out again, so I couldn't hear the weather reports.
Usage notes: usually said about a machine or engine
2. to go to sleep very quickly I was so tired, I conked out on the couch and never even made it into bed.
1. Stop functioning, fail, as in The engine finally conked out. [Colloquial; early 1900s]
2. Fall asleep, as in Every evening he conked out in front of the television set. [1940s]
3. Faint or collapse, as in I don't know if it was the heat, but she suddenly conked out. [1920s]
4. Die, as in He's paranoid about conking out and he's only twenty! [Late 1920s]
1. To fail to function; cease to be useful, effective, or operable: My computer conked out on me. The car's engine conked out halfway through the race.
2. To go to sleep, especially due to exhaustion: I conked out after studying all night.
3. To lose consciousness or awareness: He conked out after being hit by the ball. She took some medicine and conked out.
4. To cause someone or something to lose consciousness or awareness: The ball hit the goalie's head and conked her out. The mugger conked him out and grabbed his briefcase.
1. in. [for someone] to collapse, and perhaps fall asleep. I was so tired I just went home and conked out.
2. in. [for something] to break down; to quit running. I hope my computer doesn’t conk out.