The Collaborative International Dictionary of English v.0.48:
Hatted \Hat"ted\ (h[a^]t"t[e^]d), a. Covered with a hat. [1913 Webster]WordNet (r) 3.0 (2006):
hatted adj 1: wearing a hat or a hat of a particular kind; "two old ladies, neatly hatted and gloved"; "a bearskin-hatted sentry" [ant: hatless]