headstrap noun3 •A strap that holds something onto the head.Lightweight, two-strap filtering facepiece respirators with an adjustable noseclip and new braided headstraps — 2013 •A strap that secures or guides the movement of the head.Back to machine, stand erect, headstrap around forehead, Bow the head till chin touches chest, stooping a little forward at the same time. — 1900 •The strap on a bridle that runs over the top of the horse's head and along the length of both sides of the horse's head.Into this meadow, Roxana, wholly destitute of clothing, was led by Chifney, with a bridle of orange silk, ornamented at each side of the headstrap with a bow of the same colour. — 1845 formsheadstraps