n.
A noun, such as sand, oil, or honesty, that denotes a substance or concept indivisible into countable units and is preceded in English indefinite constructions by modifiers such as some or much rather than a or one.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
