A dark lantern is a candle lantern with a sliding shutter so that it may conveniently be made dark without extinguishing the candle (archaically, dark lanthorn).
The term may also mean:
The Dark Lantern, a 1653 poem by George Wither A Dark Lantern, a 1905 novel by Elizabeth Robins A Dark Lantern, a 1920 film based on the 1905 novel, directed by John S. Robertson The Dark Lantern, a 1951 autobiographical novel by Henry Williamson Kilowog, a 1986 DC Comics character known in one version as Dark Lantern The Beast's Dark Lantern, an object from the animated miniseries Over the Garden Wall