transposition

Short definition from Wiktionary

Noun

1. 1
   The act or process of transposing or interchanging.
2. 2
   A shift of a piece of music to a different musical key by adjusting all the notes of the work equally either up or down in pitch.
3. 3
   A sequence of moves resulting in a position that may also be reached by another, more common sequence.
4. 4
   An incorporation of the provisions of a European Union directive into a Member State's domestic law.

Verb

1. 1
   To transpose
2. 2
   To take on the role of another person