posterns is postern's Plural Form

postern

US 
UK 
  • n.(城,教堂等的)后门；便门；边道；(城堡的)地下暗道
Plural Form：posterns  

E-C

E-E

Web Definition

n.
1.
(城,教堂等的)后门,边门;便门
2.
边道;(城堡的)地下暗道;逃路

Sample Sentence

Definition:
AllAll,后门后门,便门便门,边道边道,地下暗道地下暗道
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard