1. Having a single wing

See also: winged

• Klinefelter's syndrome
• klipspringer
• klondike
• kloof
• Klopstock
• Klorvess
• Klotho
• kludge
• klutz
• klutzy
• Kluxer
• klystron
• Klyuchevskaya
• km
• km/h
• knack
• knacker
• knackered
• knackers
• knackwurst
• knag
• knap
• knapsack
• knapweed
• knave