1. A long flag; often tapering
   "The colourful pennon fluttered in the breeze atop the castle tower";
   - pennant, streamer, waft
    
2. Wing of a bird
   "The hawk's pennons were outstretched as it glided";
   - pinion

Derived forms: pennons

Type of: flag, wing

Part of: bird, birdie [informal]

Encyclopedia: Pennon