1. a reddish-brown sandstone used as a building material
2. a house built of brownstone, typically a row house with a front stoop

Examples

• The brownstone facade gave the building a classic 19th-century appearance.
• Many brownstone quarries operated in Connecticut during the 1800s.
• She lived in a beautiful brownstone on the Upper West Side.
• The brownstone had four stories and a distinctive front stoop.
• Brooklyn’s Park Slope is famous for its historic brownstones.
• They renovated the old brownstone to include modern amenities.
• The brownstone’s ornate details were carefully restored.