(dated) A display of coloured lights that move in shifting patterns.

limelight

limelight

(physics) The portion of the electromagnetic spectrum that is visible to humans. / (physics) an extension of the human-visible spectrum to include near-visible wavelengths, primarily near infrared.

a diamond-shaped pane of glass designed to be set in leads

The aurora of the northern hemisphere.

(Britain) a small triangular side window in a motor car

A signalling device positioned at a road intersection or pedestrian crossing to indicate when it may be safe to drive, ride or walk, using a universal colour code.

A switch, usually mounted on a wall in a building, used to turn the light on or off.

(astronomy) A soft glow of white light seen in the sky along the ecliptic in an elongated triangular form with its base being on the horizon, particularly in the tropics.