First Known Use: 14th century
Dictionary
postern
noun pos·tern \ˈpōs-tərn, ˈpäs-\
Definition of POSTERN
1
: a back door or gate
2
: a private or side entrance or way
— postern adjective
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Origin of POSTERN
Middle English posterne, from Anglo-French, alteration of Old French posterle, from Late Latin posterula, diminutive of postera back door, from Latin, feminine of posterus
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