mistress

Noun

A woman who has authority, control, or a skilled command.
an adulterous woman; a woman who has an ongoing extramarital sexual relationship with a man
a woman schoolteacher (especially one regarded as strict)
a woman master who directs the work of others
A woman, specifically one with great control, authority or ownership.
A female head of household.
A female teacher.
The other woman in an extramarital relationship, generally including sexual relations.
A dominatrix.
A woman well skilled in anything, or having the mastery over it.
A woman regarded with love and devotion; a sweetheart.
A married woman; a wife.
A respectful mode of address to a woman.
The jack in the game of bowls.
A female companion to a master (a man with control, authority or ownership).
Female equivalent of master.
Female equivalent of mister.

Verb

Of a woman: to master; to learn or develop to a high degree of proficiency.
To act or take the role of a mistress.

Examples

games mistress
She was the mistress of the estate-mansion, and owned the horses.
She was the undisputed MISTRESS of Words With Friends, winning every tournament.

Origin / Etymology

From Middle English maistresse, from Old French maistresse (whence French maîtresse), feminine of maistre (“master”). By surface analysis, mist(e)r + -ess.

Synonyms

fancy woman, kept woman, schoolma'am, schoolmarm, schoolmistress, bit on the side, boss, comaré, concubine, doxy, dulcinea, goomah, head, leader, leman, loon, minx, mistress, number two, side bitch, side chick, side piece, side ting, sprunk, strumpet, wench, wifelet

Antonyms

cicisbeo, fancy man, wife

Scrabble Score: 10

mistress: valid Scrabble (US) TWL Word
mistress: valid Scrabble Word in Merriam-Webster MW Dictionary
mistress: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 11

mistress: valid Words With Friends Word