Floozy : Prostitute : Mistress
Not directly listed, but referenced in other words to mean exactly the same as the M-W definition above.
rum doxy — A fine wench.
Mostly used for the more common variety floozy. Often used in reference to tavern wenches, women in dockside bars, etc.
A woman having intellectual or literary interests. Etymology: Bluestocking society, 18th century literary clubs.
The Bluestocking society was an informal women’s social and educational movement that came into being in England in the mid-eighteenth century in imitation of a similar – though more formal – movement in France.
Many romance novel heroines are bluestockings. Other members of society may look down on them for this decidedly unfashionable trait, but not the hero. 
A widow holding property or a title from her deceased husband : a dignified elderly woman.
Any lady of dignified bearing.
(Also had the same definition as M-W above)
Dowagers in romance novels are often depicted as formidable women, either as the widowed mother or aunt of the hero or a particularly powerful woman in society. A reader may also run into the term “dower house.” Wikipedia defines this as, “A dower house is usually a moderately large house on an estate which is occupied by the widow of the late owner. The widow, often known as the “dowager” usually moves into the dower house, from the larger family house, on the death of her husband, the new heir occupies the now vacated principal house.”
This is a term used for a debutante that is the cream of the crop — beautiful, poised and perfect.
