registration

(noun) the act of enrolling. Synonyms: enrollment, enrolment.

(noun) the body of people (such as students) who register or enroll at the same time. Synonyms: enrollment.

(noun) a document certifying an act of registering.

(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.

(noun) the act of adjusting something to match a standard. Synonyms: adjustment, readjustment.