'Hatless' definitions:

Definition of 'hatless'

From: WordNet
adjective
Not wearing a hat; "stood hatless in the rain with water dripping down his neck" [ant: hatted]

Definition of 'Hatless'

From: GCIDE
  • Hatless \Hat"less\ (h[a^]t"l[e^]s), a. Having no hat. [1913 Webster]