Titles listed as “out of print” are no longer being produced by the manufacturer. New copies may still be available from retailers, but they are limited to stock on hand. Once all remaining copies sell out, these titles are only available on the secondary market (such as eBay / Half.com).
Book no longer in a publisher's book inventory (and for which there are no republication plans). An online book search may turn up an available copy.
When the publisher is out-of-stock of a particular book, only second-hand copies are available
The publisher has no more copies for sale and does not intend to reprint the work.
a publisher's stock of a book is permanently exhausted and only second hand copies are available. see also Out of Stock
When a printed image is no longer available from the publishers. It may still be available from retail outlets, or may be found on the secondary market.
a title no longer maintained in the publisher's catalogue or inventory
No longer available from the publisher.
Out of print refers to an item, typically a book, but can include any print or visual media or sound recording, that is no longer being published.