1 definition by DanDan TechieMan

Top Definition
A circular object, usually steel, that has a pattern or shape cut out and is used in lights to manipulate how it looks. This can be to make it shapes like arrows or a window, or to give it a texture.
"Go put that foliage breakup gobo in the 3rd stage right ellipsoidal."
by DanDan TechieMan April 01, 2009

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