Definitions of replace:

• verb:   put something back where it belongs

  Example: "Replace the book on the shelf after you have finished reading it"

• verb:   substitute a person or thing for (another that is broken or inefficient or lost or no longer working or yielding what is expected)

  Example: "He replaced the old razor blade"

• verb:   put in the place of another; switch seemingly equivalent items

  Example: "The con artist replaced the original with a fake Rembrandt"

• verb:   take the place or move into the position of

  Example: "Smith replaced Miller as CEO after Miller left"