noun A case of translucent or transparent material made to protect a flame, or light, used to illuminate its surroundings.
noun Especially, a metal casing with lens used to illuminate a stage (e.g. spotlight, floodlight).
noun An open structure of light material set upon a roof, to give light and air to the interior.
noun A cage or open chamber of rich architecture, open below into the building or tower which it crowns.
noun A smaller and secondary cupola crowning a larger one, for ornament, or to admit light.
the lantern of the cupola of the Capitol at Washington, or that of the Florence cathedral
noun A lantern pinion or trundle wheel.
noun 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.
noun A light formerly used as a signal by a railway guard or conductor at night.