To replace means to put something new in the place of something else, to take over the role of someone or something, or to return something to its original position. Digital tools have largely replaced paper dictionaries for most learners.
What Does Replace Mean?
Replace is a regular transitive verb with three closely related senses. The most common is the substitution sense: removing one thing and putting something else in its position ("I need to replace the light bulb"). The second sense describes taking over a role or function, often describing technological or social change ("Streaming services have replaced DVDs"). The third, slightly more formal sense means to return something to its original place ("Please replace the books on the shelf when you are finished").
Understanding which sense is intended usually depends on context. Senses 1 and 2 imply that the original thing is gone or no longer used; sense 3 implies the original thing is being put back exactly where it came from. The word is common at B1 level but appears widely in academic, business, and everyday English up to C2.
The key grammatical pattern is replace A with B (active) or A is replaced by B (passive). Both forms are essential for fluent academic and professional writing.
Example Sentences by Level
| Sentence | Level & Usage Note |
|---|---|
| I need to replace the batteries in my remote control. | A2 — everyday object; simple present necessity |
| Our teacher was ill, so a different teacher replaced her for the day. | B1 — person substituting for another; past simple narrative |
| Digital tools have largely replaced paper dictionaries for most learners. | B1 — technology displacing an older method; present perfect with adverb |
| The company plans to replace its ageing infrastructure with cloud-based solutions over the next two years. | B2 — business/tech register; future plan with replace … with |
| No policy measure can fully replace the spontaneous trust that develops between colleagues through sustained face-to-face interaction. | C1 — abstract academic register; negated modal + adverb emphasis |
Collocations
| Collocation | Example |
|---|---|
| replace … with | They replaced the old heating system with a more efficient one. |
| be replaced by | Manual sorting was replaced by automated conveyor systems. |
| gradually replace | Online news has gradually replaced print newspapers for many readers. |
| completely replace | No single medication can completely replace a balanced diet. |
| temporarily replace | A locum doctor will temporarily replace Dr Singh during her leave. |
| replace a part / component | The mechanic had to replace several parts before the car would start. |
| replace a member of staff | It is expensive to recruit and train someone to replace a member of staff. |
| replace one thing with another | You can replace butter with olive oil in most savoury recipes. |
| seek to replace | The government is seeking to replace fossil fuels with renewable energy sources. |
| irreplaceable | Some ecosystems are irreplaceable — once lost, they cannot be restored. |
Usage Notes
How to Use Replace Correctly
- Active pattern: replace A with B — "We replaced the old server with a faster model." The old thing (A) is removed; the new thing (B) follows with.
- Passive pattern: A is replaced by B — "The old server was replaced by a faster model." Both are correct; the passive avoids stating who performed the action.
- Sense 3 (return): Use replace without with/by when something is put back in its original position: "Please replace the documents in the folder."
- Register: Replace is neutral in register and works in casual conversation, business writing, academic prose, and formal documents equally well.
- Word family: replace → replacement (n.) → replaceable (adj.) → irreplaceable (adj.) → replacing (gerund/present participle).
Common Mistakes
Watch Out For
We replaced the old system by a new one. (active voice — use with, not by)
We replaced the old system with a new one.
The old system was replaced with a new one. (passive voice — by is the standard preposition here)
The old system was replaced by a new one.
She replaced to the manager after the meeting. (incorrect: this is confuse with report or return)
She returned to the manager after the meeting. / She replaced the manager [= took over the role].
Etymology: From French replacer, formed from the prefix re- (back, again) + placer (to place), which derives from Latin platea (open space, street) via Old French. It entered English in the mid-16th century with the sense of restoring something to its proper place. The extended sense of "putting something new in the place of something old" emerged in the 17th century and is now the dominant meaning. The same Latin root gives English place, plaza, and displace.