Source : Webster's Revised Unabridged Dictionary (1913)

Brooch \Brooch\ (br[=o]ch; 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.

Brooch \Brooch\, v. t. [imp. & p. p. {Brooched} (br[=o]cht).]
   To adorn as with a brooch. [R.]

Source : WordNet®

brooch
     n : a decorative pin worn by women [syn: {broach}, {breastpin}]
     v : fasten with or as if with a brooch [syn: {clasp}]