1. (noun) a shelter or screen providing protection from enemy fire or from the weather

• shelter
• shelter

2. (noun) a small fort or earthwork defending a ford, pass, or castle gate

• earthwork
• fort
• fortress

3. (noun) a candle or flaming torch secured in a sconce

• light
• light source

4. (noun) a decorative wall bracket for holding candles or other sources of light

• bracket
• wall bracket