The Collaborative International Dictionary of English v.0.48:

Syndic \Syn"dic\, n. [L. syndictus, Gr. ? helping in a court of
   justice, advocate; sy`n with + ? justice, akin to ? to show:
   cf. F. syndic. See Teach.]
   1. An officer of government, invested with different powers
      in different countries; a magistrate.
      [1913 Webster]

   2. (Law) An agent of a corporation, or of any body of men
      engaged in a business enterprise; an advocate or patron;
      an assignee.
      [1913 Webster]

   Note: In France, syndics are appointed by the creditors of a
         bankrupt to manage the property. Almost all the
         companies in Paris, the university, and the like, have
         their syndics. The university of Cambridge, Eng., has
         its syndics, who are chosen from the senate to transact
         special business, such as the regulation of fees, the
         framing of laws, etc.
         [1913 Webster]

   3. (Civil Law) One appointed to manage an estate, essentially
      as a trustee, under English law.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

syndic
    n 1: one appointed to represent a city or university or
         corporation in business transactions

Bouvier's Law Dictionary, Revised 6th Ed (1856):

SYNDIC. A term used in the French law, which answers in one sense to our
word assignee, when applied to the management of bankrupts' estates; it has
also a more extensive meaning; in companies and communities, syndics are
they who are chosen to conduct the affairs and attend to the concerns of the
body corporate or community; and in that sense the word corresponds to
director or manager. Rodman's Notes to Code. de Com. p. 351; Civ. Code of
Louis. art. 429; Dict. de Jurisp. art. Syndic.