noun
also pen·on ˈpenən
( -s )
Etymology: Middle English, from Middle French penon, aug. of penne feather, wing — more at pen
1.
a. : a long usually triangular or swallow-tailed streamer typically attached to the head of a lance: as
(1) : one borne as the ensign of a knight bachelor in the middle ages
(2) : one borne as the ensign of a modern regiment of lancers
b. : pennant 2a
2. : a flag of any shape : banner
3. : wing , pinion
4. : a retractor muscle of the septa of a zooantharian — called also muscle pennon
Synonyms: see flag