1. The boundary between Maryland and Pennsylvania; symbolic dividing line between North and South before the American Civil War
   - Mason-Dixon line, Mason and Dixon line

Type of: state boundary, state line

• announcement
• announcer
• annoy
• annoyance
• annoyed
• annoyer
• annoying
• annoyingly
• annual
• annual fern
• annual general meeting
• annual parallax
• annual ring
• annual salt-marsh aster
• annualise
• annualize
• annually
• annualry
• annuitant
• annuity
• annuity in advance
• annul
• annular
• annular eclipse
• annular scotoma