MIL
n. countable B2 Upper Intermediate US //ˈmɪɫ// UK //mˈɪl// mil Informal
n. Stands for mother-in-law. It is a short way to write or talk about your husband or wife's mother.
n. Abbreviation for mother-in-law, referring to the mother of one's spouse. Informal in register; primarily used in digital communication and casual speech.
My MIL is coming over for dinner tonight.
After the wedding, she spent the weekend getting to know her MIL better while they looked through old family photos.
Navigating the relationship with a MIL can be a delicate balancing act of respecting established family traditions while asserting the independence of a new household.
Usage
Commonly used in online forums and text messaging; often capitalised.