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

See also: frivolous

• concert dance
• concert grand
• concert hall
• concert piano
• concert pitch
• concert-goer
• concertante
• concerted
• concerted music
• concertina
• concertino
• concertise
• concertize
• concertmaster
• concerto
• concerto grosso
• concession
• concessionaire
• concessionary
• concessioner
• concessive
• conch
• concha
• conchfish
• conchoidal