The Collaborative International Dictionary of English v.0.48:

Boln \Boln\, Bollen \Boll"en\, a.
   Swollen; puffed out.
   [1913 Webster]

         Thin, and boln out like a sail.          --B. Jonson.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bollen \Boll"en\, a.
   See Boln, a.
   [1913 Webster]