'matriarch' definitions:

Definition of 'matriarch'

From: WordNet
noun
A female head of a family or tribe [syn: matriarch, materfamilias]
noun
A feisty older woman with a big bosom (as drawn in cartoons)

Definition of 'matriarch'

From: GCIDE
  • matriarch \ma"tri*arch\, n. [L. mater mother + -arch.]
  • 1. The mother and ruler of a family or of her descendants; a ruler by maternal right. [1913 Webster]
  • 2. A woman who dominates or is the most important member of a group or organization; in businesses, often the founder or owner of the largest interest. [PJC]
  • 3. A venerated old woman. [PJC]

Synonyms of 'matriarch'

From: Moby Thesaurus