A female parent, especially of a human; a female who parents a child (which she has given birth to, adopted, or fostered).
A female who has given birth to a baby; this person in relation to her child or children.
A pregnant female; mother-to-be; a female who gestates a baby.
A female who donates a fertilized egg or donates a body cell which has resulted in a clone.
(figuratively) A female ancestor.
(figuratively) A source or origin.
Something that is the greatest or most significant of its kind. (See mother of all.)
(dated) A title of respect for one's mother-in-law.
(dated) A term of address for one's wife.
(figuratively) Any elderly woman, especially within a particular community.
(figuratively) Any person or entity which performs mothering.
Dregs, lees; a stringy, mucilaginous or film- or membrane-like substance (consisting of a culture of acetobacters) which develops in fermenting alcoholic liquids (such as wine, or cider), and turns the alcohol into acetic acid with the help of oxygen from the air.
A locomotive which provides electrical power for a slug.
The principal piece of an astrolabe, into which the others are fixed.
The female superior or head of a religious house; an abbess, etc.
(obsolete) Hysterical passion; hysteria; the uterus.
A disc produced from the electrotyped master, used in manufacturing phonograph records.
A person who is admired, respected, or looked up to within a particular fandom or community; see also: serve cunt

(transitive) To give birth to or produce (as its female parent) a child. (Compare father.)
(transitive) To treat as a mother would be expected to treat her child; to nurture.
(transitive) To cause to contain mother (“that substance which develops in fermenting alcohol and turns it into vinegar”).
(intransitive) To develop mother.