Definition of "subgroup" [sub•group]

• A distinct group within a group; a subdivision of a group. (noun)
• A subordinate group. (noun)
• Mathematics A group that is a subset of a group. (noun)
• To divide into subgroups. (verb-transitive)

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.

• "So the minimum number required to count a subgroup is a GOOD feature of the law, and if anything, that number is too low in most cases."
• "Drawing on exit polls, he infers that this subgroup is likely two-thirds Latino and concludes that, as such, the apparent shift to Republicans is the "most implausible result" in the Gallup Poll."
• "The problem with my subgroup is that I don't think this 'shutdown' will ever be possible."