transposition

noun

1. (countable, especially, uncountable)The act or process of transposing or interchanging.
2. (countable, uncountable)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. (countable, uncountable)A sequence of moves resulting in a position that may also be reached by another, more common sequence.
4. (European-Union, countable, uncountable)An incorporation of the provisions of a European Union directive into a Member State's domestic law.

verb

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