D defs.my
Entry 3 senses Webster, 1913

Guidon

/gīʹdən/ · Gui·don · IPA /ˈɡaɪdn̩/
01 n. A small flag or streamer, as that carried by cavalry, which is broad at one end and nearly pointed at the other, or that used to direct the…
  1. 1.
    A small flag or streamer, as that carried by cavalry, which is broad at one end and nearly pointed at the other, or that used to direct the movements of a body of infantry, or to make signals at sea; also, the flag of a guild or fraternity. In the United States service, each company of cavalry has a guidon.
    “The pendants and guidons were carried by the officer of the army.” Evelyn.
  2. 2.
    One who carries a flag.
  3. 3.
    One of a community established at Rome, by Charlemagne, to guide pilgrims to the Holy Land.