A lamp shade is a covering that goes over a light bulb to diffuse and shape the light, providing better illumination. It can also refer to any decorative cover for a light fixture or candle holder.
I think I see a new lamp shade in that room also, darling! (stonegableblog.com)
We also replaced clear glass lamps that had blue lamp shades with these white lamps that have Greek key trim, which coordinates with the Greek Key pillows. (sarahsofiaproductions.com)
I brought home a bunch of different lamp shades for them and ended up with these. (12thandwhite.com)