1 [U] the act of replacing one thing with another, especially sth that is newer or better:
the replacement of worn car parts * replacement windows
2 [C] a thing that replaces sth, especially because the first thing is old, broken, etc:
a hip replacement * If your passport is stolen you should apply for a replacement immediately.
3 [C] ~ (for sb) a person who replaces another person in an organization, especially in their job:
We need to find a replacement for Sue.
