Yarn/jɑːrn/ Definition 1 of 2Pro Tip 1/3Crafting Material Yarn is commonly used in crafts such as knitting. It's not just for sewing. She knitted colorful scarves with thick yarn. Pro Tip 2/3Different Textures Yarn varies in texture. There are fuzzy, silky, and rough types, each for different projects. For the baby blanket, choose a soft, fluffy yarn. Pro Tip 3/3Colorful Choices Apart from texture, yarn comes in many colors and patterns, used for aesthetic appeal. He picked a variegated yarn to add stripes to his hat.