clearance
noun uk/ˈklɪə.rəns/ us/ˈklɪr.əns/
(REMOVE)
[ S or U ]（对废物或不要的东西的）清除，清理，清扫，排除
the process of removing waste or things you do not want from a place
slum clearance 拆除房屋／贫民窟
UK They specialize in house clearances after a resident has died. 他们的专长是在某个居民去世后，对住宅进行清理。
[ S or U ]强迫迁离;强制驱逐（人们被迫迁离其长期居住地）
an occasion when people are forced to move away from the area where they live permanently
The great Highland clearances in Scotland did not reach their height until after 1800. 苏格兰的高地清洗（意为盖尔人驱逐）直到1800年后才达到人数的高峰。
(CHEAP SALE)
[ U ]（货物的）清仓减价，清仓甩卖
an occasion when goods are offered for sale cheaply so that people will be encouraged to buy them and there will be space for new goods
We bought our new carpet at a clearance sale. 我们的新地毯是在清仓大减价的时候买的。
US I buy Christmas decorations when they go on clearance in January 我在一月份清仓减价的时候购买圣诞装饰品。
(NOT TOUCHING)
[ C or U ]间距；间隙；净空
the distance or space that is needed for one thing to avoid touching another thing
It was difficult getting the piano through the doorway because we only had a clearance of a few centimetres. 把钢琴搬过这道门很难，因为只有几厘米的余地。
High vehicles should take an alternative route because of low clearance under the bridge. 高大的车辆必须改走他路，因为桥下的净空较低。
(OFFICIAL PERMISSION)
[ U ]批准，许可，准许
official permission for something or the state of having satisfied the official conditions of something
The plane will be taking off as soon as it gets clearance. 飞机一得到许可就会起飞。
To visit the prison, you'll need security clearance. 参观监狱需要通过安全审查。
(CHEQUE)
[ U ]（支票）过户，兑现，结算
the process of a cheque going from one bank to another through a central organization, so that money can be paid to the person it is owed to
Clearance (of a cheque) can take up to a week. （支票）过户要最多一个星期的时间。
(SPORT)
[ C ]（足球比赛中）将足球从本方球门前踢出，解围
in football, an occasion when a player kicks the ball away from their goal
Robinson's long clearance was controlled by Mido who went on to score. 米多控制住了罗宾逊的大脚解围，然后将球射进了球门。