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

See also: frivolous

• gimmickry
• gimmicky
• gimp
• gimpiness
• gimpy
• contemptuous
• contemptuously
• contemptuousness
• contend
• contender
• content
• content word
• contented
• contentedly
• contentedness
• contention
• contentious
• contentiousness
• contently
• contentment
• contents
• conterminous
• contessa
• contest
• contestable