1. a small window beside a door or larger window
2. a light on the side of a vehicle
3. additional information that helps explain or illuminate a main topic

Examples

• The front door had decorative sidelights on both sides.
• She turned on the car’s sidelights in the fog.
• The documentary provided interesting sidelights on the historical period.
• The ship’s red and green sidelights were clearly visible.
• The narrow sidelight let in just enough natural light.
• His memoir offers fascinating sidelights on celebrity culture.
• The pilot checked that all sidelights were functioning properly.