Source : Webster's Revised Unabridged Dictionary (1913)

Legation \Le*ga"tion\ (l[-e]*g[=a]"sh[u^]n), n. [L. legatio: cf.
   F. l['e]gation, It. legazione. See {Legate}.]
   1. The sending forth or commissioning one person to act for
      another. ``The Divine legation of Moses.'' --Bp.
      Warburton.

   2. A legate, or envoy, and the persons associated with him in
      his mission; an embassy; or, in stricter usage, a
      diplomatic minister and his suite; a deputation.

   3. The place of business or official residence of a
      diplomatic minister at a foreign court or seat of
      government.

   4. A district under the jurisdiction of a legate.

Source : WordNet®

legation
     n 1: the post or office of legate [syn: {legateship}]
     2: a permanent diplomatic mission headed by a minister [syn: {foreign
        mission}]