- a long, narrow, triangular or swallow-tailed flag borne on a lance as an ensign, as formerly by knights and lancers
- any flag or pennant
- a pinion; wing
Origin of pennonMiddle English penon from Old French from penne, a feather: see pen
- A long narrow banner or streamer borne upon a lance.
- A pennant, banner, or flag.
- A pinion; a wing.
Origin of pennonMiddle English from Old French penon streamer, feather of an arrow augmentative of penne feather from Latin penna ; see pet- in Indo-European roots.