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Definition of serial number noun from the Oxford Advanced Learner's Dictionary

serial number

noun
 
/ˈsɪəriəl nʌmbə(r)/
 
/ˈsɪriəl nʌmbər/
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  1. a number put on a product, such as a camera, television, etc., in order to identify the particular product
See serial number in the Oxford Advanced American Dictionary

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