Learner's definition of REGISTRATION
1 a : the act or process of entering information about something in a book or system of public records
[noncount] — often + of
[count] b : the act or process of entering names on an official list
Student registration (for courses) ends today.
Voter registration begins today.
A $75 registration fee is due.
2 [count], US : a document showing that something (such as a vehicle) has been officially registered