the individual number or serial designation identifying specifically any of the items, as books or records, acquired by a library, collection, or the like.
Words nearby accession number
Compare serial number.
Origin of accession number
An Americanism dating back to 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for accession number
library science the number given to record a new addition to a collection
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012