1. formally added (an item) to a museum, library, or archive collection with an official record
Usage: past tense and past participle of accession

Examples

• The museum accessioned the donated paintings last month.
• All artifacts must be properly accessioned before display.
• The librarian accessioned the rare books into the special collection.
• The newly accessioned manuscripts are now available for research.
• Items are accessioned with unique identification numbers.
• The archive has accessioned thousands of historical documents.