1. A long narrow banner or streamer borne upon a lance.
2. A pennant, banner, or flag.
3. A pinion; a wing.
[Middle English, from Old French penon, streamer, feather of an arrow, augmentative of penne, feather, from Latin penna; see pet- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.