dowager \ DOU-uh-jer \  , noun;
1.An elderly woman of stately dignity, especially one of elevated social position.
2.A woman who holds some title or property from her deceased husband, especially the widow of a king, duke, etc.

dowager - Everything about the new teacher - her southern accent, stilted attitude, fine clothing and proud dignity - screamed a single word that is as rarely used as her kind seen: dowager.

Antonym - see image