Pennon/ˈpɛnən/nounA thin, often triangular flag or streamer, especially as hung from the end of a lance or spear.A long pointed streamer or flag on a vessel.A wing (appendage of an animal's body enabling it to fly); any of the outermost primary feathers on a wing.Synonyms: pennant, pinion🔗 Explore synonyms & relationships🌍 See word origin & history