n.
Pronunciation: ' p ō s-t ə rn, ' päs-
Function: noun
Etymology: 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
Date: 14th century
1 : a back door or gate
2 : a private or side entrance or way
– postern adjective