1. Lacking seriousness; given to frivolity
   - airheaded, dizzy, featherbrained, giddy, light-headed, lightheaded, silly

See also: frivolous

• command overhead
• command post
• command processing overhead
• command processing overhead time
• command prompt
• command sergeant major
• commandant
• commandeer
• commander
• commander in chief
• commandership
• commandery
• commanding
• commanding officer
• commandment
• commando
• comme il faut
• commedia dell'arte
• commelina
• Commelinaceae
• Commelinales
• Commelinidae
• commemorate
• commemorating
• commemoration