1. Guided by whim and fancy
   "flighty young girls"
   - flyaway, head-in-the-clouds, scatterbrained 
2. Unpredictably excitable (especially of horses)
   - skittish, spooky, nervous, skittery

Derived forms: flightier, flightiest

See also: excitable, flightiness, frivolous

• head nurse
• head of hair
• head of household
• head of state
• head off
• head over heels
• head register
• head restraint
• head rhyme
• head sea
• head shop
• head smut
• head start
• head teacher
• head tone
• head trip
• head up
• head voice
• head-in-the-clouds
• head-on
• head-shrinker
• head-to-head
• head-up display
• headache
• headache powder