ma·tron 
(mātrən)
(mātrən)n.
1. A married woman or a widow, especially a mother of dignity, mature age, and established social position.
2. A woman who acts as a supervisor or monitor in a public institution, such as a school, hospital, or prison.
[Middle English matrone, from Old French, from Latin mātrōna, from māter, mātr-, mother; see māter- in the Appendix of Indo-European roots.]
matron·al adj.
matron·li·ness n.
matron·ly adv. & adj.