registration

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The act of registering.
• noun The number of persons registered; enrollment.
• noun An entry in a register.
• noun A document certifying an act of registering.
• noun A combination of organ stops selected to be used in playing a piece.
• noun The technique of selecting and adjusting organ stops.

from The Century Dictionary.

• noun The act of inserting or recording in a register; the act of recording in general: as, the registration of deeds; the registration of births, deaths, and marriages; the registration of voters.
• noun Specifically, in the law of conveyancing, a system for the recording of conveyances, mortgages, and other instruments affecting the title to real property, in a public office, for the information of all concerned.
• noun In organ-playing, the act, process, art, or result of selecting or combining stops for playing given pieces of music.
• noun One of numerous American statutes in various States, providing for registration, and often requiring it as a condition of the right to vote.
• noun In Great Britain and Ireland, the making up of a list of voters which, after judicial revision, is the accredited record of an elector's title to vote.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of registering; registry; enrollment.
• noun (Mus.) The art of selecting and combining the stops or registers of an organ.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun uncountable the act of signing up or registering for something
• noun countable that which registers or makes something official, e.g. the form or paper that registers
• noun uncountable alignment, e.g. of colors or other elements in a printing process
• noun uncountable the location where guests register, especially with a hotel.
• noun music The art of selecting and combining the stops or registers of an organ.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a document certifying an act of registering
• noun the act of adjusting something to match a standard
• 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 body of people (such as students) who register or enroll at the same time
• noun the act of enrolling