Wordnet 3.0
ADJECTIVE (1)
1. 
 suitable for the general public; 
- Example: "writings of an exoteric nature"
The Collaborative International Dictionary of English v.0.48:
Exoteric \Ex`o*ter"ic\, Exoterical \Ex`o*ter"ic*al\a. [L.
   exotericus, Gr. ? fr. ? out: cf. F. exot['e]rique. See Ex-]
   External; public; suitable to be imparted to the public;
   hence, capable of being readily or fully comprehended; --
   opposed to esoteric, or secret.
   [1913 Webster]
         The foppery of an exoteric and esoteric doctrine. --De
                                                  Quincey.
   [1913 Webster]
WordNet (r) 3.0 (2006):
exoteric
    adj 1: suitable for the general public; "writings of an exoteric
           nature" [ant: esoteric]