The Collaborative International Dictionary of English v.0.48:

Licit \Lic"it\ (l[i^]s"[i^]t), a. [L. licitus permitted, lawful,
   from licere: cf. F. licite. See License.]
   Lawful. "Licit establishments." --Carlyle. -- Lic"it*ly,
   adv. -- Lic"it*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

licitness
    n 1: the quality of strictly conforming to law [ant:
         illicitness]