other woman
noun/ˌʌðə ˈwʊmən/
/ˌʌðər ˈwʊmən/
[usually singular]- a woman that somebody is having a sexual relationship with, although they already have a wife or partner
- Jean Menkes plays the president's wife and Fiona Handley plays the other woman.
- She was the ‘other woman’ in this family drama.
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other woman