Dictionary
top' hat"
a tall, cylindrical hat with a stiff brim usually slightly curved on the sides, worn by men esp. on formal occasions. Cf.
beaver 1 (def. 4),
opera hat, silk hat. top-hat
Pronunciation: (top'hat'), [key]—
adj.
of or pertaining to polite or fashionable society.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.