hacker

hacker n.  [originally, someone who makes furniture with an
   axe] 1. A person who enjoys exploring the details of programmable
   systems and how to stretch their capabilities, as opposed to most
   users, who prefer to learn only the minimum necessary.  2. One who
   programs enthusiastically (even obsessively) or who enjoys
   programming rather than just theorizing about programming.  3. A
   person capable of appreciating {hack value}.  4. A person who is
   good at programming quickly.  5. An expert at a particular program,
   or one who frequently does work using it or on it; as in `a UNIX
   hacker'.  (Definitions 1 through 5 are correlated, and people who
   fit them congregate.)  6. An expert or enthusiast of any kind.  One
   might be an astronomy hacker, for example.  7. One who enjoys the
   intellectual challenge of creatively overcoming or circumventing
   limitations.  8. [deprecated] A malicious meddler who tries to
   discover sensitive information by poking around.  Hence `password
   hacker', `network hacker'.  The correct term is {cracker}.

   The term `hacker' also tends to connote membership in the global
   community defined by the net (see {network, the} and
   {Internet address}).  It also implies that the person described
   is seen to subscribe to some version of the hacker ethic (see
   {hacker ethic, the}).

   It is better to be described as a hacker by others than to describe
   oneself that way.  Hackers consider themselves something of an
   elite (a meritocracy based on ability), though one to which new
   members are gladly welcome.  There is thus a certain ego
   satisfaction to be had in identifying yourself as a hacker (but if
   you claim to be one and are not, you'll quickly be labeled
   {bogus}).  See also {wannabee}.