Brooch (brōch; 277), n. [See Broach, n.] 1. An ornament, in various forms, with a tongue, pin, or loop for attaching it to a garment; now worn at the breast by women; a breastpin. Formerly worn by men on the hat.
Honor 's a good brooch to wear in a man's hat.
B. Jonson.
2. (Paint.) A painting all of one color, as a sepia painting, or an India painting.