chatelaine /ˈʃætəleɪn/ noun3 •(old-fashioned) The mistress of a castle or large household.Cars passed her on the road; the people of the quarry town knew her and bowed to her; she was considered the chatelaine of the countryside, as her mother had been long ago. — 1943 •A similar thing in miniature attached to a watchchain. •(historical) A chain or clasp worn at the waist by women with handkerchief, keys, etc., attached, supposed to resemble the chain of keys once worn by medieval chatelaines.The latest fashion is to wear watches suspended from the chatelaine. The chatelaine is short, and ornamented with charms. — 1869 formschatelaines · châtelaines