Emily Dickinson Lexicon

BROOCH, n. [broche; Slav. obrutsh, or obruch, a ring, a circle, a bracelet.]

1. An ornamental utensil for fastening the vest, or the bosom of a shirt, as formerly used in America. It is usually made of silver, often round, with a tongue crossing its diameter, sometimes with two tongues. It formerly was used in England, as it was in America, and is still in the highlands of Scotland. – Encyc.
2. A jewel.
3. With painters, a painting all of one color. – Dict.