say it: MAY-tree-ahrk
matriarch is a noun meaning "a female head of a family or tribe". It carries 2 recorded senses.
a female head of a family or tribe
a feisty older woman with a big bosom (as drawn in cartoons)
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for matriarch come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.