Wordnet 3.0
NOUN (1)
1.
a round piece of luggage for carrying hats;
The Collaborative International Dictionary of English v.0.48:
Hatbox \Hat"box`\ (-b[o^]ks`), n.
A box for a hat.
[1913 Webster]
WordNet (r) 3.0 (2006):
hatbox
n 1: a round piece of luggage for carrying hats