subsection noun 4verb 1forms 3 noun4 •A defined part of a section.To them, just being a webhead or computer geek is not enough. The culture has its own subsections […] — 2005 •A subpart of a legal document such as law.In the end, the deadlock was resolved by a minor -- but for the National Party symbolically important -- addition to one of the other subsections of the language clause. — 2003 •An informal taxonomic category below section and above family. •A taxonomic rank below section and above species. verb1 •To insert subsections (into some text, etc.) formssubsectioned · subsectioning · subsections