"mistresses" in the noun sense
1. mistress, kept woman, fancy woman
an adulterous woman a woman who has an ongoing extramarital sexual relationship with a man
2. schoolmarm, schoolma'am, schoolmistress, mistress
a woman schoolteacher (especially one regarded as strict)
3. mistress
a woman master who directs the work of others
Source: WordNet® (An amazing lexical database of English)
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