The Collaborative International Dictionary of English v.0.48:

Transpose \Trans*pose"\, v. t. [imp. & p. p. Transposed; p.
   pr. & vb. n. Transposing.] [F. transposer; pref. trans- (L.
   trans across) + poser to put. See Pose.]
   [1913 Webster]
   1. To change the place or order of; to substitute one for the
      other of; to exchange, in respect of position; as, to
      transpose letters, words, or propositions.
      [1913 Webster]

   2. To change; to transform; to invert. [R.]
      [1913 Webster]

            Things base and vile, holding no quantity,
            Love can transpose to form and dignity. --Shak.
      [1913 Webster]

   3. (Alg.) To bring, as any term of an equation, from one side
      over to the other, without destroying the equation; thus,
      if a + b = c, and we make a = c - b, then b is said to be
      transposed.
      [1913 Webster]

   4. (Gram.) To change the natural order of, as words.
      [1913 Webster]

   5. (Mus.) To change the key of.
      [1913 Webster]

WordNet (r) 3.0 (2006):

transposed
    adj 1: turned about in order or relation; "transposed letters"
           [syn: converse, reversed, transposed]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "transposed":
   arsy-varsy, ass over elbows, back-to-front, backwards, capsized,
   changeable, chiastic, commutable, commutative, convertible, equal,
   equalizing, equivalent, even, everted, exchanged, give-and-take,
   hyperbatic, inside out, interchangeable, interchanged, introverted,
   invaginated, inversed, inverted, mutual, outside in, palindromic,
   permutable, reciprocal, reciprocating, reciprocative, resupinate,
   retaliatory, retroverted, returnable, reversed, standard, swapped,
   switched, topsy-turvy, traded, upside-down, wrong side out