cosh cosh /kɒʃ/

abbreviation

1. Hyperbolic cosine (cosh) - Similar to sinh but with a positive value over its domain.  ( cosh )
   hyperbolic cosine (cosh) - Similar to sinh but with a positive value over its domain.
   

noun

1. [Informal, British] A piece of metal covered by leather with a flexible handle; used for hitting people  ( blackjack [ N. American] , cosh [Informal, British] , sap [Informal, N. American] )
   a piece of metal covered by leather with a flexible handle; used for hitting people
   
   

verb

1. [Informal, British] Hit with a cosh, usually on the head  ( cosh [Informal, British] )
   hit with a cosh, usually on the head