Kail \Kail\, n. 1. (Bot.) A kind of headless cabbage. Same as {Kale}, 1. 2. Any cabbage, greens, or vegetables. [OE. or Scot.] 3. A broth made with kail or other vegetables; hence, any broth; also, a dinner. [Scot.] {Kail yard}, a kitchen garden. [Scot.]