1. covered with cobwebs
2. so thin as to transmit light
e.g. a hat with a diaphanous veil
filmy wings of a moth
gauzy clouds of dandelion down
gossamer cobwebs
sheer silk stockings
transparent chiffon
vaporous silks
Synonym: diaphanousfilmygauzygauze-likegossamersee-throughsheertransparentvaporousvapourous