The Collaborative International Dictionary of English v.0.48:

Manhood \Man"hood\, n. [Man- + -hood.]
   1. The state of being man as a human being, or man as
      distinguished from a child or a woman.
      [1913 Webster]

   2. Manly quality; virility; courage; bravery; resolution.
      [1913 Webster]

            I am ashamed
            That thou hast power to shake my manhood thus.
                                                  --Shak.
      [1913 Webster]

   3. The genitalia of a male human.
      [PJC]

   4. The condition of being a human being.
      [PJC] man hour

WordNet (r) 3.0 (2006):

manhood
    n 1: the state of being a man; manly qualities
    2: the quality of being human; "he feared the speedy decline of
       all manhood" [syn: humanness, humanity, manhood]
    3: the status of being a man