\Boln\, v. i. [OE. bolnen, bollen; cf. Dan. bulne. Cf.
{Bulge}.]
To swell; to puff. --Holland.

\Boln\, Bollen \Boll"en\, a.
Swollen; puffed out.
      Thin, and boln out like a sail.          --B. Jonson.