The Collaborative International Dictionary of English v.0.48:

Satan \Sa"tan\ (s[=a]"tan, s[a^]t"an obs ), n. [Heb. s[=a]t[=a]n
   an adversary, fr. s[=a]tan to be adverse, to persecute: cf.
   Gr. Sata^n, Satana^s, L. Satan, Satanas.]
   The grand adversary of man; the Devil, or Prince of darkness;
   the chief of the fallen angels; the archfiend.
   [1913 Webster]

         I beheld Satan as lightning fall from heaven. --Luke x.
                                                  18.
   [1913 Webster] Satanic

WordNet (r) 3.0 (2006):

Satan
    n 1: (Judeo-Christian and Islamic religions) chief spirit of
         evil and adversary of God; tempter of mankind; master of
         Hell [syn: Satan, Old Nick, Devil, Lucifer,
         Beelzebub, the Tempter, Prince of Darkness]

The Free On-line Dictionary of Computing (19 January 2023):

Security Administrator's Integrated Network Tool
SATAN

    (SAINT, originally "Security
   Administrator Tool for Analyzing Networks", SATAN) A tool
   written by Dan Farmer and Wietse Venema which remotely probes
   systems via the network and stores its findings in a
   database.  The results can be viewed with an web browser.
   SAINT requires Perl 5.000 or better.

   In its simplest mode, SAINT gathers as much information about
   remote hosts and networks as possible by examining such
   network services as finger, NFS, NIS, FTP, TFTP,
   rexd, and other services.  The information gathered includes
   the presence of various network information services as well
   as potential security flaws - usually in the form of
   incorrectly setup or configured network services, well-known
   bugs in system or network utilities, or poor or ignorant
   policy decisions.  It can then either report on this data or
   use a simple rule-based system to investigate any potential
   security problems.  Users can then examine, query, and analyze
   the output with a web browser.  While the program is
   primarily geared toward analysing the security implications
   of the results, a great deal of general network information
   can be gained when using the tool - network topology, network
   services running, and types of hardware and software being
   used on the network.

   SAINT can also be used in exploratory mode.  Based on the
   initial data collection and a user configurable ruleset, it
   will examine the avenues of trust and dependency and iterate
   further data collection runs over secondary hosts.  This not
   only allows the user to analyse his own network, but also to
   examine the real implications inherent in network trust and
   services and help them make reasonably educated decisions
   about the security level of the systems involved.

   (http://wwdsi.com/saint/).

   Old SATAN page (http://fish.com/satan/).

   Mailing list (http://wwdsi.com/saint/list_server.html).

   (2000-08-12)


The Devil's Dictionary (1881-1906):

SATAN, n.  One of the Creator's lamentable mistakes, repented in
sashcloth and axes.  Being instated as an archangel, Satan made
himself multifariously objectionable and was finally expelled from
Heaven.  Halfway in his descent he paused, bent his head in thought a
moment and at last went back.  "There is one favor that I should like
to ask," said he.
    "Name it."
    "Man, I understand, is about to be created.  He will need laws."
    "What, wretch! you his appointed adversary, charged from the dawn
of eternity with hatred of his soul -- you ask for the right to make
his laws?"
    "Pardon; what I have to ask is that he be permitted to make them
himself."
    It was so ordered.