The Collaborative International Dictionary of English v.0.48:

Mankind \Man"kind`\, a.
   Manlike; not womanly; masculine; bold; cruel. [Obs]
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         Are women grown so mankind? Must they be wooing?
                                                  --Beau. & Fl.
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         Be not too mankind against your wife.    --Chapman.
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The Collaborative International Dictionary of English v.0.48:

mankind \man`kind"\, n. [AS. mancynn. See Kin kindred, Kind,
   n.]
   1. The human race; man, taken collectively.
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            The proper study of mankind is man.   --Pore.
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   2. Men, as distinguished from women; the male portion of
      human race. --Lev. xviii. 22.
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   3. Human feelings; humanity. [Obs] --B. Jonson.
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WordNet (r) 3.0 (2006):

mankind
    n 1: all of the living human inhabitants of the earth; "all the
         world loves a lover"; "she always used `humankind' because
         `mankind' seemed to slight the women" [syn: world, human
         race, humanity, humankind, human beings, humans,
         mankind, man]