1. Period when something or someone is attacked or criticized without restraint 
2. Period of the year during which game can be hunted without restriction

Derived forms: open seasons

• air rifle
• air sac
• Air Sea Rescue
• air search radar
• air shaft
• air show
• air sock
• air spring
• air station
• air strike
• air terminal
• air thermometer
• air traffic
• abbreviate
• abbreviated
• abbreviation
• abbreviator
• abbreviatory
• abbé
• ABC
• ABC's
• abcoulomb
• Abdias
• abdicable
• abdicate