gos ‧ sa ‧ mer /ˈɡɒsəmə $ ˈɡɑːsəmər/ BrE AmE noun [uncountable]
[ Date: 1300-1400 ; Origin: goose + summer ; probably because gossamer appears at a time of year when geese are ready for eating ]
1 . literary a very light thin material
2 . the light silky thread which ↑ spider s leave on grass and bushes