[, ]official permission that is given to sb before they can work somewhere, have particular information, or do sth they want to do （允许某人在某处工作或准许接触特定资料之前所给予的）审查许可，审核批准◆The company has been given clearance to market the drug. 公司经批准可以销售这种药。◆I need clearance from my supervisor before I can make such a large payment. 我必须得到主管的审查许可才能支付这样大额的款项。⨁to be given / get / need / obtain / receive / require clearance 获得／得到／需要／取得／接受／需要审查许可
() [] official permission for a person, a vehicle or goods to enter or leave an airport or a country （人、交通工具、货物出入空港或出入境的）许可，准许◆The pilot was waiting for clearance for take-off. 飞行员正等待起飞的命令。◆How long will customs clearance take? 清关需要多长时间？⨁to be given / get / need / obtain / receive / require clearance 获得／得到／需要／取得／接受／需要许可
[, ]the process of a cheque being paid by a bank （支票的）兑现◆Allow four working days for cheque clearance. 支票兑现需要四个工作日。