to colour cloth by tying it in knots so that when it is put in a dye (= substance for changing the colour of cloth) the tied areas absorb less colour and produce circular patterns when unfastened

There are pictures of my grandparents in the 60s wearing flares and tie-dyed T-shirts. 有几张60年代我的祖父母穿着喇叭裤和扎染T恤衫的照片。