brooch

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A piece of jewelry that is worn on a piece of clothing, attached with a pin that clasps shut.

from The Century Dictionary.

• To adorn with or as with a brooch or brooches.
• noun An ornamental clasp consisting of a pin and a projecting or covering shield, used for fastening the dress, or merely for display.
• noun A monotint, or picture in one color, as a sepia sketch.

from the GNU version of the Collaborative International Dictionary of English.

• noun 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.
• noun (Paint.) A painting all of one color, as a sepia painting, or an India painting.
• transitive verb rare To adorn as with a brooch.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A piece of women’s ornamental jewellery having a pin allowing it to be fixed to garments worn on the upper body.
• verb transitive To adorn as with a brooch.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a decorative pin worn by women
• verb fasten with or as if with a brooch