Definitions of transposition:

• noun:   (music) playing in a different key from the key intended; moving the pitch of a piece of music upwards or downwards
• noun:   the act of reversing the order or place of
• noun:   (electricity) a rearrangement of the relative positions of power lines in order to minimize the effects of mutual capacitance and inductance

  Example: "He wrote a textbook on the electrical effects of transposition"

• noun:   (mathematics) the transfer of a quantity form one side of an equation to the other along with a change of sign
• noun:   (genetics) a kind of mutation in which a chromosomal segment is transfered to a new position on the same or another chromosome
• noun:   any abnormal position of the organs of the body
• noun:   an event in which one thing is substituted for another