[ pohst-di-tur-muh-ner ]
/ ˌpoʊst dɪˈtɜr mə nər /

noun Grammar.

a member of a subclass of English adjectival words, including ordinal and cardinal numbers, that may be placed after an article or other determiner and before a descriptive adjective, as first and three in the first three new chapters.

Origin of postdeterminer Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019