Noun
1. a woman who has given birth to a child (also used as a term of address to your mother);
"the mother of three children"2. a stringy slimy substance consisting of yeast cells and bacteria; forms during fermentation and is added to cider or wine to produce vinegar
3. a term of address for an elderly woman
4. a condition that is the inspiration for an activity or situation;
"necessity is the mother of invention"