What is the correct meaning of the word brooch?

The antique brooch had a beautiful purple stone in it.
decorative pin
work of art
piece of furniture
colored glass

The correct meaning of the word brooch is a decorative pin.

The correct meaning of the word brooch is a decorative pin. It is a piece of jewelry that is typically worn on clothing as an accessory. In the given context, the antique brooch refers to a decorative pin that had a beautiful purple stone in it.