1. the blade or cutting part of a plough that cuts into and turns over the soil
Usage: also spelled 'plowshare' in U.S. English; agricultural term

Examples

• The farmer sharpened the ploughshare before the spring planting season.
• A worn ploughshare can reduce the efficiency of the entire plough.
• The ploughshare bit deep into the earth as the oxen pulled the plough forward.
• He replaced the damaged ploughshare with a new one made of hardened steel.
• The biblical phrase 'beat swords into ploughshares' symbolizes peace and agricultural prosperity.