Definitions for "Union catalog"
A union catalog contains cataloging records from more than one collection or library. Example: WebLUIS/USF lists the material available in all the University of South Florida Libraries. WebLUIS Union Catalog lists all the material available at Florida's ten state university system libraries including USF.
A catalog which lists materials held by a group of libraries.
an accessible list of the combined cataloged holdings of all the libraries in a library system or of the collections of a group of independent libraries
a database containing the records of a number of different organizations