The Collaborative International Dictionary of English v.0.48:

Mother \Moth"er\ (m[u^][th]"[~e]r), n. [OE. moder, AS. m[=o]dor;
   akin to D. moeder, OS. m[=o]dar, G. mutter, OHG. muotar,
   Icel. m[=o][eth]ir, Dan. & Sw. moder, OSlav. mati, Russ.
   mate, Ir. & Gael. mathair, L. mater, Gr. mh`thr, Skr.
   m[=a]t[.r]; cf. Skr. m[=a] to measure. [root]268. Cf.
   Material, Matrix, Metropolis, Father.]
   1. A female parent; especially, one of the human race; a
      woman who has borne a child.
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   2. That which has produced or nurtured anything; source of
      birth or origin; generatrix.
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            Alas! poor country! . . . it can not
            Be called our mother, but our grave.  --Shak.
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            I behold . . . the solitary majesty of Crete, mother
            of a religion, it is said, that lived two thousand
            years.                                --Landor.
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   3. An old woman or matron. [Familiar]
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   4. The female superior or head of a religious house, as an
      abbess, etc.
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   5. Hysterical passion; hysteria. [Obs.] --Shak.
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   Mother Carey's chicken (Zool.), any one of several species
      of small petrels, as the stormy petrel (Procellaria
      pelagica), and Leach's petrel (Oceanodroma leucorhoa),
      both of the Atlantic, and Oceanodroma furcata of the
      North Pacific.

   Mother Carey's goose (Zool.), the giant fulmar of the
      Pacific. See Fulmar.

   Mother's mark (Med.), a congenital mark upon the body; a
      birthmark; a naevus.
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