Definitions of transpose:

• noun:   a matrix formed by interchanging the rows and columns of a given matrix
• verb:   change key

  Example: "Can you transpose this fugue into G major?"

• verb:   put (a piece of music) into another key
• verb:   transfer a quantity from one side of an equation to the other side reversing its sign, in order to maintain equality
• verb:   transpose and remain equal in value
• verb:   transfer from one place or period to another
• verb:   cause to change places
• verb:   change the order or arrangement of

  Example: "Dyslexics often transpose letters in a word"