A tie-dye is a garment or piece of cloth that has been tie-dyed. They wore tie-dyes and ponchos. a hideous tie-dye shirt. to make a pattern on a piece of material by tying string around it and colouring it with dye (=coloured liquid)
If a piece of cloth or a garment is tie-dyed, it is tied in knots and then put into dye, so that some parts become more deeply coloured than others. He wore a T-shirt that had been tie-dyed in bright colours I bought a great tie-dyed silk scarf