Emily Dickinson Lexicon

HAT, n. [Sax. hæt; G. hut; D. hoed; Dan. hat; Sw. hatt; W. hêd or het. The word signifies a cover, and in German, finger-hut is a thimble. The primary sense is probably to ward off, or defend.]

1. A covering for the head; a garment made of different materials, and worn by men or women for defending the head from rain or heat, or for ornament. Hats for men are usually made of fur or wool, and formed with a crown and brim. Hats for females are made of straw or grass braid, and various other materials. Of these the ever varying forms admit of no description that can long be correct.
2. The dignity of a cardinal.