A case of translucent or transparent material made to protect a flame, or light, used to illuminate its surroundings.

(theater) Especially, a metal casing with lens used to illuminate a stage (e.g. spotlight, floodlight).

(architecture) An open structure of light material set upon a roof, to give light and air to the interior.

(architecture) A cage or open chamber of rich architecture, open below into the building or tower which it crowns.

(architecture) A smaller and secondary cupola crowning a larger one, for ornament, or to admit light.

(engineering) A lantern pinion or trundle wheel.

(steam engines) A kind of cage inserted in a stuffing box and surrounding a piston rod, to separate the packing into two parts and form a chamber between for the reception of steam, etc.; a lantern brass.

(rail transport) A light formerly used as a signal by a railway guard or conductor at night.

(metalworking) A perforated barrel to form a core upon.

(zoology) Aristotle's lantern

(transitive) To furnish with a lantern.

Of a facial feature, large and squarish in shape as an old-fashioned lantern.