1. Not exhibiting or characterized by careful thought
   - unthinking, unthoughtful

See also: thoughtless

• 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