v. t. to hit on the head; as, to conk someone on the head with a pipe. [ slang ] [ PJC ]
n. 1. the head. [ slang ] [ PJC ]
2. a blow to the head. [ slang ] [ PJC ]
n. the inedible nutlike seed of the horsechestnut. Syn. -- buckeye, horsechestnut, horse-chestnut. [ WordNet 1.5 ]