The Collaborative International Dictionary of English v.0.48:

Vice \Vice\, a. [Cf. F. vice-. See Vice, prep.]
   Denoting one who in certain cases may assume the office or
   duties of a superior; designating an officer or an office
   that is second in rank or authority; as, vice president; vice
   agent; vice consul, etc.
   [1913 Webster]

   Vice admiral. [Cf. F. vice-amiral.]
   (a) An officer holding rank next below an admiral. By the
       existing laws, the rank of admiral and vice admiral in
       the United States Navy will cease at the death of the
       present incumbents.
   (b) A civil officer, in Great Britain, appointed by the lords
       commissioners of the admiralty for exercising admiralty
       jurisdiction within their respective districts.

   Vice admiralty, the office of a vice admiral.

   Vice-admiralty court, a court with admiralty jurisdiction,
      established by authority of Parliament in British
      possessions beyond the seas. --Abbott.

   Vice chamberlain, an officer in court next in rank to the
      lord chamberlain. [Eng.]

   Vice chancellor.
   (a) (Law) An officer next in rank to a chancellor.
   (b) An officer in a university, chosen to perform certain
       duties, as the conferring of degrees, in the absence of
       the chancellor.
   (c) (R. C. Ch.) The cardinal at the head of the Roman
       Chancery.

   Vice consul [cf. F. vice-consul], a subordinate officer,
      authorized to exercise consular functions in some
      particular part of a district controlled by a consul.

   Vice king, one who acts in the place of a king; a viceroy.


   Vice legate [cf. F. vice-l['e]gat], a legate second in rank
      to, or acting in place of, another legate.

   Vice presidency, the office of vice president.

   Vice president [cf. F. vice-pr['e]sident], an officer next
      in rank below a president.
      [1913 Webster]

WordNet (r) 3.0 (2006):

vice president
    n 1: an executive officer ranking immediately below a president;
         may serve in the president's place under certain
         circumstances [syn: vice president, V.P.]

Moby Thesaurus II by Grady Ward, 1.0:

92 Moby Thesaurus words for "vice president":
   agent, alternate, alternative, analogy, archon, backup, chancellor,
   change, changeling, chief executive, chief executive officer,
   comparison, copy, counterfeit, dean, deputy, double, dummy, equal,
   equivalent, ersatz, exchange, executive, executive director,
   executive officer, executive secretary, fake, fill-in, ghost,
   ghostwriter, imitation, locum tenens, magistrate, makeshift,
   management, managing director, metaphor, metonymy, next best thing,
   officer, official, personnel, phony, pinch hitter, prefect,
   president, prexy, provost, proxy, relief, replacement,
   representative, reserves, ringer, second string, secondary,
   secretary, sign, spares, stand-in, sub, substituent, substitute,
   substitution, succedaneum, superseder, supplanter, surrogate,
   symbol, synecdoche, the administration, third string, token,
   treasurer, understudy, utility player, vicar, vice-chairman,
   vice-chancellor, vice-consul, vice-director, vice-governor,
   vice-king, vice-legate, vice-master, vice-premier, vice-queen,
   vice-regent, vice-warden, vicegerent, viceroy, warden