The Collaborative International Dictionary of English v.0.48:

Re-form \Re-form"\ (r?*f?rm"), v. t. & i. [imp. & p. p.
   Re-formed (-f?rmd"); p. pr. & vb. n. Re-forming.]
   To give a new form to; to form anew; to take form again, or
   to take a new form; as, to re-form the line after a charge.
   [1913 Webster]