clearance /ˈklirəns/ noun plural clearances
plural clearances
Learner's definition of CLEARANCE
1
a : an official decision saying that someone has permission to do something许可；批准 [noncount]
-
You'll have to get clearance [=approval] from management to go ahead with the project.你必须得到管理部门的批准才能启动这个项目。
-
The documents are only available to people with security clearance [=special permission given only to people who are approved to know or see secret things] from the government.只有得到政府许可才能查看这些文件。
[count]
b : official permission for an aircraft, pilot, etc., to do something（给飞机、飞行员等发出的）许可 [noncount]
[count]
2
: the amount of space between two things间隙；间距 [noncount]
[count]
3
[noncount] : the act or process of removing things (such as trees or old buildings) from an area清理；清除