Definition of gossamer

• n. - A fine, filmy substance, like cobwebs, floating in the air, in calm, clear weather, especially in autumn. It is seen in stubble fields and on furze or low bushes, and is formed by small spiders.
• n. - Any very thin gauzelike fabric; also, a thin waterproof stuff.
• n. - An outer garment, made of waterproof gossamer.