hairiness noun2 •The characteristic of being hairy.The fore-feet of the Yahoo differed from my hands in nothing else but the length of the nails, the coarseness and brownness of the palms, and the hairiness on the backs. — 1726 •A characteristic of yarn: the proportion of fibre ends that stick out and are not embedded in the yarn body.There was a reduction in hairiness of yarn after warping by about 17% in comparison to the hairiness of the wound yarn. — 1978 formshairinesses