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.]
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   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.
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   2. To change; to transform; to invert. [R.]
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            Things base and vile, holding no quantity,
            Love can transpose to form and dignity. --Shak.
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   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.
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   4. (Gram.) To change the natural order of, as words.
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   5. (Mus.) To change the key of.
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