Definition of "conker"

conker¹

/ˈkɒŋkə/

noun
plural conkers
1. (Britain) A horse chestnut, used in the game of conkers.
  Quotations
  His bald spot gleams like a burnished conker.
  2006, Peter Godwin, When a Crocodile Eats the Sun: A Memoir of Africa

conker²

noun
1. Alternative form of kankar
  Quotations
  The roads are not exceeded by any throughout India; hard conker pounded, makes them as level as a table.
  1833, Edward C. Archer, Tours in Upper India and in Parts of the Himalaya Mountains, page 89