guidon/ˈɡaɪdn̩/EtymologyFrom French guidon, from Italian guidone. Equivalent of guide + on.guidon means A small pennant or banner carried by infantry soldiers to direct troop movement. Lexicurio rates it Sui generis — a strength score of 86 out of 100.nounA small pennant or banner carried by infantry soldiers to direct troop movement.A soldier assigned to carry such a banner.