Oxford Dictionary English ploughshare noun (North American English plowshare) noun BrE BrE//ˈplaʊʃeə(r)// ; NAmE NAmE//ˈplaʊʃer// (North American English also share) Add to my wordlistjump to other results the broad curved blade of a plough Word Originlate Middle English: from plough + Old English scær, scear ‘ploughshare’ (related to shear).Idioms turn swords into ploughshares Add to my wordlistjump to other results(literary) to stop fighting and return to peaceful activities See related entries: WeaponsCheck pronunciation: ploughshare oxfordlearnersdictionaries.com