# aquifer

/ˈækwəfɝ/ (US) · /ˈækwɪfɐ/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/aquifer
Updated: 2026-05-19

## Definition

a layer of soil or rock that holds water and allows it to flow through. It acts like a natural underground reservoir that people can pump water from.

For teachers: a body of saturated soil or rock through which water can flow. It serves as a natural reservoir for groundwater, which is often extracted for human use.

## Examples

- The local farmers rely on the aquifer for their crops.
- Heavy rainfall in the mountains helps recharge the aquifer, ensuring a steady supply of clean water for the city.
- Environmental scientists are monitoring the aquifer for signs of contamination, as the slow movement of water through the limestone makes it difficult to clean once pollutants are introduced.

---

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.