Source : Webster's Revised Unabridged Dictionary (1913)

Embassy \Em"bas*sy\, n.; pl. {Embassies}. [OF. ambass['e]e,
   embasc['e]e, LL. ambasciata, fr. ambasciare for ambactiare to
   go on a mission, fr. L. ambactus vassal, dependent, of Celtic
   or German origin; cf. W. amaeth husbandman, Goth. andbahts
   servant, G. amt office, OHG. ambaht. Cf. {Ambassador}.]
   1. The public function of an ambassador; the charge or
      business intrusted to an ambassador or to envoys; a public
      message to; foreign court concerning state affairs; hence,
      any solemn message.

            He sends the angels on embassies with his decrees.
                                                  --Jer. Taylor.

   2. The person or persons sent as ambassadors or envoys; the
      ambassador and his suite; envoys.

   3. The residence or office of an ambassador.

   Note: Sometimes, but rarely, spelled ambassy.