A straightforward term for a woman who is married. Used in formal and everyday contexts.
She is a married woman with two children.
既婚者 is a gender-neutral term for a married person, while 既婚女性 specifically refers to a married woman.
未婚女性 means 'unmarried woman', the opposite of 既婚女性.
Compound of 既婚 (kikon, 'married') and 女性 (josei, 'woman').