Noun
1. an event in which one thing is substituted for another;
"the replacement of lost blood by a transfusion of donor blood"2. the act of furnishing an equivalent person or thing in the place of another;
"replacing the star will not be easy"3. someone who takes the place of another person
4. a person or thing that takes or can take the place of another
5. filling again by supplying what has been used up
6. a person who follows next in order;
"he was President Lincoln's successor"