Definition of "Replace" :
verb: substitute a person or thing for (another that is broken or inefficient or lost or no longer working or yielding what is expected)
"He replaced the old razor blade."
verb: put something back where it belongs
"Replace the book on the shelf after you have finished reading it."
verb: put in the place of another; switch seemingly equivalent items
"The con artist replaced the original with a fake Rembrandt."
verb: take the place or move into the position of
"Smith replaced Miller as CEO after Miller left."