What does replacement mean?
A replacement is something or someone that takes the place of another thing or person. The word can refer either to the process of replacing an original item or to the substitute itself. For example, a replacement battery restores a device to working order, while a replacement manager assumes responsibilities previously held by someone else. In everyday use, the term often implies that the original has been lost, damaged, withdrawn, or found unsuitable. It can also have a technical meaning, as with a replacement part, and a workplace meaning, as when a company hires a replacement for a departing employee. Although substitute is closely related, replacement more often emphasizes the new item's function as a replacement for a specific original.
nounThe act of putting something or someone in place of another, or the thing or person that takes its place. A replacement may be a substitute chosen because the original has been lost, damaged, removed, or is no longer suitable.
- The act of replacing something or someone.
- A thing or person used in place of another.
- A person who takes over a role, position, or function from another.
"The replacement for the broken part arrived the following morning."
"The clinic arranged a replacement for the therapist who was unavailable."
"We kept the old chair until a suitable replacement could be found."
"Her appointment as department chair was the replacement of a long-serving colleague."
The plural is formed by adding -s.
"The manufacturer offers replacements for all damaged components."
A replacement is more than a spare: it is the thing that steps into the gap when the original can no longer do the job.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does replacement come from?
Replacement derives from replace, which comes through Middle English and Old French from Latin replacere, meaning “to place again.” The prefix re- indicates repetition or restoration, while placere means “to place.” The English family includes related words such as place and placid, as well as plicate, all associated with the Latin roots of placing, folding, or laying.
Related word forms
How replacement is actually used
The word is common in both formal and informal contexts. In technical and industrial settings, it often denotes a component or item installed in place of an original; in employment and organizational contexts, it can refer to a person who succeeds someone in a role.
Easily confused with replacement
A replacement is the item or person that takes the place of something, whereas a substitute is the general term for anything used as an alternative.