What does "aquifer" mean?

An underground layer of water-bearing porous stone, earth, or gravel.

Aquifer

Common synonyms include: freshwater aquifer, groundwater, underground reservoir, water bearing formation, water source.

/ˈækwɪfə/ noun

noun ·Rare ·Advanced level

Noun

1
An underground layer of water-bearing porous stone, earth, or gravel.
"The water in the well came from an aquifer."
2
underground bed or layer yielding ground water for wells and springs etc wordnet

"The aquifer provides water for irrigation."

From aqui- + -fer.