GNU Collaborative International Dictionary of English

Found one definition 

  1.       

    Roke , n. [See Reek.]
    1. Mist; smoke; damp [Prov. Eng.] [Written also roak, rook, and rouk.]
      1913 Webster
    2. A vein of ore. [Pov.Eng.]
      Halliwell.

      1913 Webster