The Collaborative International Dictionary of English v.0.48:

erudite \er"u*dite\ ([e^]r"[-u]*d[imac]t; 135), a. [L. eruditus,
   p. p. of erudire to free from rudeness, to polish, instruct;
   e out + rudis rude: cf. F. ['e]rudit. See Rude.]
   Characterized by extensive reading or knowledge; well
   instructed; learned. "A most erudite prince." --Sir T. More.
   "Erudite . . . theology." --I. Taylor. -- er"u*dite`ly,
   adv. -- er"u*dite`ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

erudite
    adj 1: having or showing profound knowledge; "a learned jurist";
           "an erudite professor" [syn: erudite, learned]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "erudite":
   abstruse, civilized, cultivated, cultured, deep, educated,
   encyclopedic, learned, lettered, literate, pansophic, polyhistoric,
   polymath, polymathic, profound, scholarly, scholastic, studious,
   well-read, wise