- The act, process, or result of classifying. (noun)
- A category or class. (noun)
- Biology The systematic grouping of organisms into categories on the basis of evolutionary or structural relationships between them; taxonomy. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.