: a subdivision of a chapter: such as
: a subunit of a chapter of an organization
The club's New York chapter has four subchapters.
: a subdivision of a chapter in a text (such as a book or statute)
And between each chapter is a short subchapter, examining topics such as snowmaking, telemarking, mogul skiing, and heli-skiing.—Mike Ginkel … a 1958 revamp of the tax code adding a subchapter S that created a new category for businesses …—The Tampa (Florida) Tribune
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