# implantation

/ˌɪmpɫænˈteɪʃən/ (US) · /ɪmplɑːntˈeɪʃən/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/implantation
Updated: 2026-05-11

## Definition

the process where something is placed firmly into a person's body, such as a medical device or a tiny egg starting a pregnancy.

For teachers: the attachment of a fertilized egg to the uterine lining, or the surgical insertion of a device or tissue into the body.

## Examples

- The implantation of the heart valve was a success.
- Successful implantation of the embryo usually occurs about a week after fertilization.
- The surgeon monitored the patient closely to ensure there was no immune response following the implantation of the synthetic graft.

## Usage notes

- Uncountable when referring to the biological process; countable when referring to specific medical procedures.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.