1. Where slavery was prohibited
   - free-soil, non-slave

See also: free

• USAF
• usage
• Usama bin Laden
• usance
• USB
• Usbeg
• Usbek
• USCB
• USD
• USDA
• use
• use immunity
• use of goods and services
• use up
• useable
• useableness
• used
• used to
• used-car
• used-car lot
• useful
• usefully
• usefulness
• useless
• uselessly