from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An underground bed or layer of earth, gravel, or porous stone that yields water.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An underground layer of water-bearing porous stone, earth, or gravel
from the GNU version of the Collaborative International Dictionary of English
- n. an underground bed or layer yielding ground water for wells and springs etc.. The water contained in an aquifer may be of great age, and in such cases is sometimes called fossil water.
from The Century Dictionary and Cyclopedia
- n. In geology, a water-bearing bed or stratum, necessarily of some open-textured rock.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. underground bed or layer yielding ground water for wells and springs etc
From Latin aqui-, from aqua + -fer, from Latin ferō. (Wiktionary)