1. registration, enrollment, enrolment(noun)

    the act of enrolling

  2. registration, enrollment(noun)

    the body of people (such as students) who register or enroll at the same time

  3. registration(noun)

    a document certifying an act of registering

  4. registration(noun)

    (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

  5. adjustment, registration, readjustment(noun)

    the act of adjusting something to match a standard