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. [ 1913 Webster ]
Honor 's a good brooch to wear in a man's hat. B. Jonson. [ 1913 Webster ]
2. (Paint.) A painting all of one color, as a sepia painting, or an India painting. [ 1913 Webster ]