1 the part of a hard hat (a helmet) that you can pull down to protect your eyes or face 面甲（头盔的一部份，可拉下来保护眼睛或面部）

2 a piece of plastic, cloth, etc on a hat or in a car, which stops the sun shining into your eyes （帽子的）遮阳，帽舌；（汽车的）遮阳板 ☞picture at hat 见hat插图