Source : Webster's Revised Unabridged Dictionary (1913)

Christian \Chris"tian\, a.

   {Christian Endeavor, Young People's Society of}. In various
      Protestant churches, a society of young people organized
      in each individual church to do Christian work; also, the
      whole body of such organizations, which are united in a
      corporation called the United Society of Christian
      Endeavor, organized in 1885. The parent society was
      founded in 1881 at Portland, Maine, by Rev. Francis E.
      Clark, a Congregational minister. Christian Era \Christian
Era\
   The era in use in all Christian countries, which was intended
   to commence with the birth of Christ. The era as now
   established was first used by Dionysius Exiguus (died about
   540), who placed the birth of Christ on the 25th of December
   in the year of Rome 754, which year he counted as 1 a. d.
   This date for Christ's birth is now generally thought to be
   about four years too late.

Christian \Chris"tian\, a.
   1. Pertaining to Christ or his religion; as, Christian
      people.

   3. Pertaining to the church; ecclesiastical; as, a Christian
      court. --Blackstone.

   4. Characteristic of Christian people; civilized; kind;
      kindly; gentle; beneficent.

            The graceful tact; the Christian art. --Tennyson.

   {Christian Commission}. See under {Commission}.

   {Christian court}. Same as {Ecclesiastical court}.

   {Christian era}, the present era, commencing with the birth
      of Christ. It is supposed that owing to an error of a monk
      (Dionysius Exiguus, d. about 556) employed to calculate
      the era, its commencement was fixed three or four years
      too late, so that 1890 should be 1893 or 1894.

   {Christian name}, the name given in baptism, as distinct from
      the family name, or surname.

Christian \Chris"tian\, n. [L. christianus, Gr. ?; cf. AS.
   cristen. See {Christ}.]
   1. One who believes, or professes or is assumed to believe,
      in Jesus Christ, and the truth as taught by Him;
      especially, one whose inward and outward life is conformed
      to the doctrines of Christ.

            The disciples were called Christians first in
            Antioch.                              --Acts xi. 26.

   2. One born in a Christian country or of Christian parents,
      and who has not definitely becomes an adherent of an
      opposing system.

   3. (Eccl.)
      (a) One of a Christian denomination which rejects human
          creeds as bases of fellowship, and sectarian names.
          They are congregational in church government, and
          baptize by immersion. They are also called {Disciples
          of Christ}, and {Campbellites}.
      (b) One of a sect (called {Christian Connection}) of
          open-communion immersionists. The Bible is their only
          authoritative rule of faith and practice.

   Note: In this sense, often pronounced, but not by the members
         of the sects, kr[=i]s"chan.

Source : WordNet®

Christian
     adj 1: relating to or characteristic of Christianity; "Christian
            rites"
     2: following the teachings or manifesting the qualities or
        spirit of Jesus Christ [ant: {unchristian}]

Christian
     n : a religious person who believes Jesus is the Christ and who
         is a member of a Christian denomination