oかあkaaさんsan
1.

A polite and affectionate term used by children to address or refer to their own mother, commonly employed in everyday conversations within the family.

2.

A designation for a wife in the context of family life, highlighting her role as a mother within a household, often used by her husband.

3.

A term that denotes a woman who holds the role of a mother, which can also be used by mothers when they refer to themselves in relation to their children.

4.

A respectful way to refer to someone else's mother or to convey good wishes to her in communication, often used to express a degree of familiarity and respect.

5.

In the context of the geisha community, it refers to the proprietress of a tea house or brothel, respected by the courtesans and entertainers working under her.

Example:

お母さんに口答えしてはいけませんよ。