Source : Webster's Revised Unabridged Dictionary (1913)

Fasten \Fas"ten\, v. t. [imp. & p. p. {Fastened}; p. pr. & vb.
   n. {Fastening}.] [AS. f[ae]stnian; akin to OHG. festin[=o]n.
   See {Fast}, a.]
   1. To fix firmly; to make fast; to secure, as by a knot,
      lock, bolt, etc.; as, to fasten a chain to the feet; to
      fasten a door or window.

   2. To cause to hold together or to something else; to attach
      or unite firmly; to cause to cleave to something, or to
      cleave together, by any means; as, to fasten boards
      together with nails or cords; to fasten anything in our
      thoughts.

            The words Whig and Tory have been pressed to the
            service of many successions of parties, with very
            different ideas fastened to them.     --Swift.

   3. To cause to take close effect; to make to tell; to lay on;
      as, to fasten a blow. [Obs.] --Dryden.

            If I can fasten but one cup upon him. --Shak.

   {To fasten} {a charge, or a crime}, {upon}, to make his guilt
      certain, or so probable as to be generally believed.

   {To fasten one's eyes upon}, to look upon steadily without
      cessation. --Acts iii. 4.

   Syn: To fix; cement; stick; link; affix; annex.

Fasten \Fas"ten\, v. i.
   To fix one's self; to take firm hold; to clinch; to cling.

         A horse leech will hardly fasten on a fish. --Sir T.
                                                  Browne.

Source : WordNet®

fasten
     v 1: cause to be firmly attached; "fasten the lock onto the
          door"; "she fixed her gaze on the man" [syn: {fix}, {secure}]
          [ant: {unfasten}]
     2: become fixed or fastened; "This dress fastens in the back"
        [ant: {unfasten}]
     3: attach to; "They fastened various nicknames to each other"
     4: make tight or tighter; "Tighten the wire" [syn: {tighten}]