The Collaborative International Dictionary of English v.0.48:
cliquish \cli"quish\ (kl[=e]"k[i^]sh), a. Of or pertaining to a clique; disposed to from cliques; exclusive in spirit. -- Cli"*quish*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
cliquishness n 1: tendency to associate with only a select group [syn: clannishness, cliquishness, exclusiveness]