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

Type of: mail

• Austrocedrus
• Austrocedrus chilensis
• Austronesia
• Austronesian
• Austronesian language
• Austrotaxus
• Austrotaxus spicata
• autacoid
• autacoidal
• autarchic
• autarchical
• autarchy
• autarkic
• autarkical
• autarky
• auteur
• authentic
• authentically
• authenticate
• authenticated
• authentication
• authenticator
• authenticity
• authigenic
• author