noun

1. a woman who has borne a child; esp., a woman as she is related to her child or children
2. 1. a stepmother
   2. an adoptive mother
   3. a mother-in-law
3. the female parent of a plant or animal
4. that which gives birth to something, is the origin or source of something, or nurtures in the manner of a mother
5. 1. a woman having the responsibility and authority of a mother
   2. mother superior: used esp. as a title
6. an elderly woman: used as a title of affectionate respect
7. Slang motherfucker: somewhat vulgar

adjective

1. of, like, or like that of a mother
2. derived or learned from or as if from one's mother; native: mother tongue
3. designating a company, institution, etc. from which another or others originated: mother church

transitive verb

1. to be the mother of; give birth to: often used figuratively
2. to look after or care for as a mother does