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top hat
noun
boater
noun
crown
noun
tarboosh
noun
pork-pie hat
noun
toque
noun
trilby
noun
cap
noun
fez
noun
mortar board
noun
bowler
noun
Fred Astaire
Ginger Rogers
Definition of
top hat noun
from the Oxford Advanced Learner's Dictionary
top hat
noun
(
also
informal
topper
)
a man's tall black or grey hat, worn with formal clothes on very formal occasions