1. gauzy-so thin as to transmit light; 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.cobwebby, diaphanous, filmy, gauze-like, see-through, vaporous, vapourous, gossamer, transparent, sheer.. gauzy-so thin as to transmit light; 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.