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Definition of baseball cap noun from the Oxford Advanced Learner's Dictionary

baseball cap

noun
 
/ˈbeɪsbɔːl kæp/
 
/ˈbeɪsbɔːl kæp/
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  1. a cap with a long peak (= a curved part sticking out in front), originally worn by baseball players
See baseball cap in the Oxford Advanced American Dictionary
swamp
noun
 
 
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