1. Curved or curving in and out
   - sinuous, wiggly 
2. Having a strongly waved margin alternately concave and convex

See also: curved, curving, smooth

• airpost
• airs
• airscrew
• airship
• airsick
• airsickness
• airside
• airspace
• airspeed
• airstream
• airstrip
• airt
• airtight
• airtime
• airwave
• airway
• airwoman
• airworthiness
• airworthy
• airy
• airy-fairy
• aisle
• ait
• aitch
• aitchbone