conker

[ kong-ker, kawng- ]
/ ˈkɒŋ kər, ˈkɔŋ- /

noun British Informal.

a horse chestnut.
the hollowed-out shell of a horse chestnut.
conkers, a game in which a child swings a horse chestnut on a string in an attempt to break that of another player.

Origin of conker

1840–50; probably orig. conquer; compare conquering a game played with snail shells (the name of the game presumably later transferred to the playing pieces)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for conkers (1 of 2)

conkers

/ (ˈkɒŋkəz) /

noun

(functioning as singular) British a game in which a player swings a horse chestnut (conker), threaded onto a string, against that of another player to try to break it

Word Origin for conkers

C19: from dialect conker snail shell, originally used in the game

British Dictionary definitions for conkers (2 of 2)

conker

/ (ˈkɒŋkə) /

noun

an informal name for horse chestnut (def. 2)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012