mother-in-law

noun5

1. •
   The mother of one's spouse.

   • For I am come to set a man at variance* against his father, ⁊ the daughter against her mother, and the daughter in law against her mother in law. — 1611
2. •
   A mother-in-law apartment.
3. •
   A spicy Caribbean sauce made with peppers, carrots, onions, lime juice, etc.
4. •
   A mother-in-law sandwich.
5. •
   (no longer used) A stepmother.

   • Do but consider, my dear Mr. Dashwood, how excessively comfortable your mother-in-law and her daughters may live on the interest of seven thousand pounds, — 1811