| Registration 1. (n.) The act of registering; registry; enrollment. 2. (n.) The art of selecting and combining the stops or registers of an organ. Thesaurus Entries booking, cataloging, chronicling, enlistment, enrollment, entering, entry, filing, impanelment, indexing, inscribing, inscription, insertion, inventorying, itemization, listing, logging, matriculation, posting, record keeping, recordation, recording, register, registry, tabulation |