[1] : The Collaborative International Dictionary of English v.0.48

reenter \reen"ter\, re-enter \re-en"ter\r??n"t?r, v. t.
   1. to enter again; as, you cannot re-enter the country with
      this visa.
      1913 webster

   2. engraving to cut deeper, as engraved lines on a plate of
      metal, when the engraving has not been deep enough, or the
      plate has become worn in printing.
      1913 webster

   3. computers to put data into a document or form on a
      computer again; -- usually to correct an erroneous entry;
      as, the password was incorrect, and had to be reentered.
      pjc

[2] : The Collaborative International Dictionary of English v.0.48

reenter \reen"ter\, v. i.
   to enter anew or again.
   1913 webster

   reentering angle, an angle of a polygon pointing inward, as
      a, in the cut.

   reentering polygon, a polygon having one or more reentering
      angles.
      1913 webster
see also:
reentering angle reentering polygon 

[3] : WordNet (r) 2.0

re-enter
     v : enter again; "you cannot re-enter the country with this
         visa"

Re-Enter >> R Words
Re-Enter, definition of term: Re-Enter
re-enter_pag1.html