1. A set of books or publications consisting of multiple volumes.
Usage: Usually plural; refers to a complete or partial collection of bound books on a related topic or by the same author.

1. Consisting of or published in multiple volumes.
Usage: Attributive use; describes works, encyclopedias, or collections spanning more than one book.

Examples

• The library acquired a complete multivolumes encyclopedia set from the 1980s.
• She spent years collecting the multivolumes history of the Roman Empire.
• This multivolumes dictionary is an essential reference for serious language learners.
• The author's multivolumes biography spans over 3,000 pages.
• We organized the multivolumes collection alphabetically on the shelf.
• The multivolumes nature of the work made it both comprehensive and expensive.