Read the dictionary definition of registration. All definitions for this word.
1. the act of enrolling
2. the act of adjusting something to match a standard
3. (music) the sound property resulting from a combination of organ stops used to perform a particular piece of music; the technique of selecting and adjusting organ stops
4. a document certifying an act of registering
5. the body of people (such as students) who register or enroll at the same time