From Longman Dictionary of Contemporary Englishbookendbook‧end /ˈbʊkend/ noun [countable usually plural] DHFone of a pair of objects that you put at the end of a row of books to prevent them from falling over
Examples from the Corpus
bookend• Hood ornaments of streamlined nymphs bearing tiny globes stood as bookends to his Architectural Digests.• The onyx was shipped to Tijuana to be fabricated into bookends, chessmen and other tourist kitsch. 