1. Mail that includes letters and postcards and packages sealed against inspection
   - first class, first-class mail, 1st-class mail

Type of: mail

• north northeast
• north northwest
• North Pacific
• North Peak
• North Platte
• North Platte River
• North Pole
• North Sea
• north side
• North Star
• North Star State
• North Temperate Zone
• North Vietnam
• North Vietnamese
• north wind
• North Yorkshire
• north-central
• north-polar
• north-seeking pole
• north-south direction
• Northampton
• Northamptonshire
• northbound
• northeast
• northeast by east