Definition of "straw hat"

She felt uncomfortable and ridiculous in her heavy straw hat and dark, tight-fitting linen dress with the padded shoulders.

2008, Michael Cantwell, Chasing Mayan Dreams: Adventures in the Mexican Rain Forest

Mr. Dodgson removed his hat as he and Dr. Doyle settled themselves into their carriage, across from a stout man in a striped jacket and straw hat, and two ladies of middle years dressed in severely cut ecru linen summer traveling dresses.

2014, Roberta Rogow, The Problem of the Missing Miss

Although the day was lightly overcast, Gulliver wore a torn large-brimmed straw hat.

2015, Maureen Earl, Gulliver Quick: A Novel