# inactivation

/ˌɪˌnæktɪˈveɪʃən/ (US) · CEFR C1 · Noun

Source: https://englishreference.com/word/inactivation
Updated: 2026-05-28

## Definition

the process of making something stop working or become less active. In science, it often describes how a virus or a chemical loses its power to cause harm.

For teachers: the process of rendering a substance, organism, or mechanism ineffective or non-functional. Often refers to the neutralization of biological agents like viruses or enzymes.

## Examples

- The vaccine uses inactivation to stop the virus from spreading.
- Researchers are studying the inactivation of specific genes to understand how they affect the body's immune response.
- The rapid inactivation of the enzyme by high temperatures explains why the chemical reaction ceases immediately once the heat source is removed.

---

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.