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bar

noun [C] (LONG PIECE)
 
 
/bɑːr/ US  /bɑːr/

Definition

B2 a long, thin, straight piece of metal or wood: The gorilla rattled the bars of its cage.Poles, rods, shafts and sticks B1 a substance that has been made into a solid rectangular shape: a bar of soap a chocolate barPatterns and shapes The bar of an electric heater is a long, thin wire in the shape of a spring that is wrapped tightly around a tube. When electricity passes through it, it produces heat and red light.Heaters and burners
(Definition of bar noun (LONG PIECE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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