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

• self-worth
• selfhood
• selfish
• selfish person
• selfishly
• selfishness
• selfless
• selflessly
• selflessness
• selfsame
• selfsameness
• Seljuk
• Selkirk
• Selkirk Mountains
• Selkup
• sell
• sell short
• sell up
• sell-by date
• sellable
• seller
• Sellers
• sellers' market
• selling
• selling agent