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Sidelight

noun

Noun

1
A light found at the side of something; especially of a vehicle.
"If it starts getting misty, put your sidelights on."
2
light carried by a boat that indicates the boat's direction; vessels at night carry a red light on the port bow and a green light on the starboard bow wordnet
3
A light found at the side of something; especially of a vehicle.; (nautical) Red and green navigation lights indicating each side of a ship for collision avoidance; red on the port (left) and green on the starboard. broadly
4
A window found at one or both sides of a door.
5
A piece of incidental information that helps one understand a subject.
"A book of this type is necessarily mainly factual, but it is diversified by many incidents and sidelights which help to give life to a story now accorded its due place in railway history."

From side + light.

Unscramble this word: sidelight