Noun replacement has 6 senses
  1. substitution, permutation, transposition, replacement, switch - an event in which one thing is substituted for another; "the replacement of lost blood by a transfusion of donor blood"
    --1 is a kind of variation, fluctuation
    Derived form: verb replace1
  2. replacement, replacing - the act of furnishing an equivalent person or thing in the place of another; "replacing the star will not be easy"
    --2 is a kind of substitution, exchange, commutation
    --2 has particulars:
     novation; pitching change; supersedure, supersession; supplanting, displacement
    Derived forms: verb replace2, verb replace3, verb replace1
  3. surrogate, alternate, replacement - someone who takes the place of another person
    --3 is a kind of stand-in, substitute, relief, reliever, backup, backup man, fill-in
    Derived forms: verb replace2, verb replace1
  4. substitute, replacement - a person or thing that takes or can take the place of another
    --4 is a kind of equivalent
    --4 has particulars: ersatz; successor; succedaneum
    Derived forms: verb replace2, verb replace1
  5. refilling, replenishment, replacement, renewal - filling again by supplying what has been used up
    --5 is a kind of filling
  6. successor, replacement - a person who follows next in order; "he was President Lincoln's successor"
    --6 is a kind of peer, equal, match, compeer