The Collaborative International Dictionary of English v.0.48:

Re \Re\ (r[=a]). [It.] (Mus.)
   A syllable applied in solmization to the second tone of the
   diatonic scale of C; in the American system, to the second
   tone of any diatonic scale.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Re- \Re-\ (r[=e]-). [L. re-, older form (retained before vowels)
   red-: cf. F. re-, r['e]-.]
   A prefix signifying back, against, again, anew; as, recline,
   to lean back; recall, to call back; recede; remove; reclaim,
   to call out against; repugn, to fight against; recognition, a
   knowing again; rejoin, to join again; reiterate; reassure.
   Combinations containing the prefix re- are readily formed,
   and are for the most part of obvious signification.
   [1913 Webster]

   Note: With the increase of electronic connunications, in
         which the vowels with a diaeresis (e.g. ["e]) are
         seldom used in contrast with printed materials, some
         words with re followed by a vowel are now spelled with
         a hyphen to indicate that the two vowels are to be
         pronounced as two syllables rather than as one
         syllable, as in re-emerge rather than re["e]merge. The
         unbroken forms (e.g. reemerge) are, however, usually
         more commonly used, and the pronunciation with two
         syllables for the two vowels is taken as understood.
         [PJC]

Moby Thesaurus II by Grady Ward, 1.0:

31 Moby Thesaurus words for "re":
   about, anent, apropos of, as, as for, as regards, as respects,
   as to, concerning, in connection with, in point of, in re,
   in reference to, in regard to, in relation to, in relation with,
   in respect to, of, on, pertaining to, pertinent to, referring to,
   regarding, relating to, relative to, respecting, speaking of,
   touching, upon, with regard to, with respect to



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

RE
       RAID Edition (WD, RAID)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

RE
       Research and Engineering, "R&E"


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

RE
       Recommendation Engine (OP, Oracle, DB)