/,redʒɪ'streɪʃn; ,rɛdʒɪ`streʃən/
n
1 [U] registering or being registered 登记; 注册; 挂号
*registration of letters, parcels, trunks, etc 信件、包裹、衣箱等的挂号
* registration of students for a course/examination 学生之选课[考试]登记
* [attrib 作定语] registration fees 注册费.
2 [C] entry in a register 登记或注册的项目
*an increase in registrations for ballet classes 芭蕾舞班注册人数的增加.

n
[U]
the act of recording names and details on an official list
registration of
　the registration of motor vehicles
　Student registration (=for a course of study) starts the first week in September.
　The registration fee is $75.
[C]AmE
an official piece of paper containing details about a motor vehicle and the name of its owner
　May I see your license and registration , ma'am?