Volunteerと教育考

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   1. One who enters into, or offers for, any service of his own free will.

   2. (Mil.) One who enters into service voluntarily, but who,
      when in service, is subject to discipline and regulations
      like other soldiers; -- opposed to conscript;
      specifically, a voluntary member of the organized militia
      of a country as distinguished from the standing army.

   3. (Law) A grantee in a voluntary conveyance; one to whom a
      conveyance is made without valuable consideration; a
      party, other than a wife or child of the grantor, to whom,
      or for whose benefit, a voluntary conveyance is made. --Burrill.
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