Definition of ploughshare noun from the Oxford Advanced Learner's Dictionary

 

ploughshare

 noun
(North American English plowshare)noun
BrE BrE//ˈplaʊʃeə(r)//
 
; NAmE NAmE//ˈplaʊʃer//
 
(North American English also share)
 
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  • the broad curved blade of a plough
  • Word Origin late Middle English: from plough + Old English scær, scear ‘ploughshare’ (related to shear).Idioms
    turn swords into ploughshares
     
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    (literary) to stop fighting and return to peaceful activities See related entries: Weapons