Definition of clinker noun from the Oxford Advanced Learner's Dictionary

     

    clinker

     noun
    noun
    BrE BrE//ˈklɪŋkə(r)//
     
    ; NAmE NAmE//ˈklɪŋkər//
     
     
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  1. 1[uncountable, countable] the hard rough substance left after coal has burnt at a high temperature; a piece of this substance
  2. 2[singular] (North American English) a wrong musical note The singer hit a clinker.
  3. Word Origin sense 1 mid 17th cent.: from obsolete Dutch klinckaerd (earlier form of klinker), from klinken ‘to clink’. sense 2 late 17th cent. (denoting a person or thing that clinks): from clink ‘a sharp ringing sound’ + -er. The current sense dates from the 1930s.
See the Oxford Advanced American Dictionary entry: clinker