Definition of pennon in English:

pennon

noun

  • 1A long triangular or swallow-tailed flag, especially one of a kind formerly attached to a lance or helmet; a pennant.

    banner, banderole, streamer, flag, standard, ensign, jack, colour, colours
    View synonyms
    1. 1.1 A tapering flag on a ship.

Origin

Late Middle English: from Old French, from a derivative of Latin penna ‘feather’.

Pronunciation

pennon

/ˈpenən//ˈpɛnən/