eyebrow /ˈaɪˌbɹaʊ/noun 3verb 2forms 3phrases 1 noun3 •The hair that grows over the bone ridge above the eye socket. •A dormer, usually of small size, whose roof line over the upright face is typically an arched curve, turning into a reverse curve to meet the horizontal line at either end. •A clump of waste fibres that builds up in a roller machine. verb2 •To signal with one's eyebrows.Rodas watched Tinker disappear through the door before eyebrowing a question at Barrow. Barrow gestured at him to stay put. Rodas settled back. — 2015 •To build up waste fibres in a roller machine. formseyebrowed · eyebrowing · eyebrows Phrases with eyebrow eyebrow-raisingAn expression of surprise, wonder, or disbelief.