The Collaborative International Dictionary of English v.0.48:

Camp \Camp\ (k[a^]mp), v. t. [imp. & p. p. Camped (k[a^]mt;
   215); p. pr. & vb. n. Camping.]
   To afford rest or lodging for, as an army or travelers.
   [1913 Webster]

         Had our great palace the capacity
         To camp this host, we all would sup together. --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Camping \Camp"ing\, n.
   1. Lodging in a camp.
      [1913 Webster]

   2. [See Camp, n., 6] A game of football. [Prov. Eng.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

camping
    n 1: the act of encamping and living in tents in a camp [syn:
         camping, encampment, bivouacking, tenting]