Definition from Wiktionary, the free dictionary
Alternative forms 
plowshare (plural plowshares)
- The cutting edge of a plow, typically a metal blade.
- And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more. (Isaiah 2:4, KJV)
Related terms 
The cutting edge of a plow, typically a metal blade.