WordWeb Online

1. The act of furnishing an equivalent person or thing in the place of another
   "replacing the star will not be easy";
   - replacement

1. 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"; "We need to replace the secretary that left a month ago"; "the insurance will replace the lost income"; "This antique vase can never be replaced"
    
2. Take the place or move into the position of
   "Smith replaced Miller as CEO after Miller left"; "Mary replaced Susan as the team's captain and the highest-ranked player in the school";
   - supplant, supersede, supervene upon, supercede [non-standard]
    
3. Put something back where it belongs
   "replace the book on the shelf after you have finished reading it";
   - put back
    
4. Put in the place of another; switch seemingly equivalent items
   "the con artist replaced the original with a fake Rembrandt";
   - substitute, interchange, exchange, sub [informal]

Type of: alter, change, come after, commutation, exchange, follow, lay, modify, place, pose, position, put, regenerate, renew, set, substitution, succeed

Encyclopedia: Replacing