1. the hard brown seed of a horse chestnut tree
Usage: British
2. a children’s game played with conkers threaded on strings, where players try to break their opponent’s conker
Usage: British

Examples

• The children collected shiny conkers that had fallen from the horse chestnut tree.
• She drilled a hole through the conker and threaded it with string.
• The annual conker championship attracts players from across Britain.
• His conker was a ‘sixer’ because it had broken six others.
• We spent autumn afternoons playing conkers in the schoolyard.
• The largest conker won the contest for best specimen.