# acidification

/əˌsɪdəfəˈkeɪʃən/ (US) · /ɐsˌɪdɪfɪkˈeɪʃən/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/acidification
Updated: 2026-05-30

## Definition

the process of something becoming more acidic. This often describes how the ocean or soil changes when it absorbs too much carbon dioxide.

For teachers: the process of becoming more acidic, typically through the absorption of carbon dioxide or the release of hydrogen ions. Often used in environmental science to describe oceanic or atmospheric changes.

## Examples

- Ocean acidification is a major threat to coral reefs.
- Scientists are studying how the acidification of soil affects the growth of local crops and the health of the surrounding forest.
- The rapid acidification of the world's oceans has led to a significant decline in shellfish populations, as the lower pH levels make it difficult for them to form and maintain their calcium carbonate shells.

---

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.