a piece of paper, wood, metal, etc. that has writing or a picture on it that gives you information, instructions, a warning, etc. 招牌；标志◆There is a sign displaying the name of the company on the roof of the building. 大厦顶部有一块标示公司名称的牌子。◆flashing neon signs 闪烁的霓虹灯招牌◆a sign board 招牌
a mark used to represent sth 符号◆a plus/minus sign (+/−) 加／减号◆a euro/dollar sign (€/$) 欧元／美元符号