hair·y / ˈhe(ə)rē/ • adj. (hair·i·er, hair·i·est) 1. covered with hair, esp. thick or long hair: a hairy chest. ∎ having a rough feel or appearance suggestive of coarse hair: a hairy tweed coat and skirt.2. inf. alarming and difficult: we drove up yet another hairy mountain road.DERIVATIVES: hair·i·ly / ˈhe(ə)rəlē/ adv.hair·i·ness n.