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Definition of top hat noun from the Oxford Advanced Learner's Dictionary

top hat

noun
 
/ˌtɒp ˈhæt/
 
/ˈtɑːp hæt/
(also informal topper)
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  1. a man’s tall black or grey hat, worn with formal clothes on very formal occasionsTopics Clothes and Fashionc1
See top hat in the Oxford Advanced American Dictionary
hat-trick
noun
 
 
From the Topic
Sports
C2
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