dark lantern

from The American Heritage® Dictionary of the English Language, 4th Edition

• n. A lantern whose light can be blocked, as by a sliding panel.

from Wiktionary, Creative Commons Attribution/Share-Alike License

• n. A lantern with a panel that slides to block the light.

from the GNU version of the Collaborative International Dictionary of English

• adj. See Lantern.
• n. a lantern with a single opening, which may be closed so as to conceal the light; -- called also bull's-eye.

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

• n. a lantern with a single opening and a sliding panel that can be closed to conceal the light