1. The oldest woman in a family (a grandmother or great-grandmother) who thus has the most seniority.

2. The head of a family in a matrilineal society

3. The ruler in a matriarchy.
The matriarch looked proudly over her great progeny, from her eldest daughter to her newest heir, her month-old great-granddaughter.
by Lorelili October 16, 2010
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A "Manatee Matriarch" is the dominant fat bitch, amongst a group or heard of grotesque obese women. This dominant land walking sea cow is usually the most socially developed and least shy to do ridiculous things. It is important to identify the "Manatee Matriarch" when taunting a group of fat bitches, for the "Manatee Matriarch" is the most likely candidate to thump you to the ground, should she manage to catch you.
"Don't piss off that bitch, she's the manatee matriarch".
"Look at that heard of land walking sea cows! Led by the manatee matriarch".
by The Crimson Adder July 07, 2009
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-noun

1. Female foundational member of a framily unit. This woman usually has outstanding culinary skills and doesn't mind using them.

2. A woman of outstanding character that facilitates the framily gathering.

3. A motherly woman of culinary brilliance that shrinks when angry.
Dinner was astounding! I think Paula Dean could learn a few things from our framily matriarch!

Thank God for my framily matriarch! Without her I couldn't have afforded a vacation this year!

I am thankful for my framily matriarch: Mother to all Misfit Children, she who shrinks when she's angry, buys Christmas decorations in July, grills a mean London broil, turns vegetarians into carnivores, cooks for all us with love and gives each and every one of us a place of home and sense of family regardless of our situation.
by achilles866 December 08, 2009
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The opposite of a pillow princess; someone, usually female, willing to exclusively give during sexual activity
I’m okay with any mattress matriarchs for our sex cult.
by BJmama69 October 03, 2021
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