The Collaborative International Dictionary of English v.0.48:

Elucidate \E*lu"ci*date\, v. t. [imp. & p. p. Elucidated; p.
   pr. & vb. n. Elucidating.] [LL. elucidatus, p. p. of
   elucidare; e + lucidus full of light, clear. See Lucid.]
   To make clear or manifest; to render more intelligible; to
   illustrate; as, an example will elucidate the subject.
   [1913 Webster]

WordNet (r) 3.0 (2006):

elucidate
    v 1: make clear and (more) comprehensible; "clarify the mystery
         surrounding her death" [syn: clarify, clear up,
         elucidate] [ant: obfuscate]
    2: make free from confusion or ambiguity; make clear; "Could you
       clarify these remarks?"; "Clear up the question of who is at
       fault" [syn: clear, clear up, shed light on,
       crystallize, crystallise, crystalize, crystalise,
       straighten out, sort out, enlighten, illuminate,
       elucidate]