The Collaborative International Dictionary of English v.0.48:

Throng \Throng\, v. i. [imp. & p. p. Thronged; p. pr. & vb. n.
   Thronging.]
   To crowd together; to press together into a close body, as a
   multitude of persons; to gather or move in multitudes.
   [1913 Webster]

         I have seen the dumb men throng to see him. --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

thronged
    adj 1: filled with great numbers crowded together; "I try to
           avoid the thronged streets and stores just before
           Christmas"