subtribe noun2 •A tribe making up part of a larger tribe.This leaves for consideration of this group of small tribes, or subtribes, so far as mapped by the writer quoted, the Teule, Cazcan, and Tecuexe. — 1911 •A taxonomic category ranking below tribe.Brieger and his associates first divide the subtribe Epidendrinae […] into what could be called series, distinguishing four such series in the subtribe. — 1993 formssubtribes