N-COUNT (尤指海员在暴风雨时戴的)防水帽(其后沿较宽可防水护颈) A sou'wester is a waterproof hat that is worn especially by sailors in stormy weather. It has a wide brim at the back to keep your neck dry. (尤指海员在暴风雨时戴的)防水帽(其后沿较宽可防水护颈)