Definition of nonhierarchical
: not hierarchical;
especially
: not divided into, organized by, or involving different levels of importance or status
- a nonhierarchical organization/structure
- All great groups have extraordinary leaders. It's a paradox, really, because great groups tend to be collegial and nonhierarchical, peopled by singularly competent individuals who often have an anti-authoritarian streak.
- —Warren Bennis and Patricia Ward Biederman
