The Collaborative International Dictionary of English v.0.48:

Rector \Rec"tor\ (r?k"t?r), n. [L., fr. regere, rectum, to lead
   straight, to rule: cf. F. recteur. See Regiment, Right.]
   [1913 Webster]
   1. A ruler or governor. [R.]
      [1913 Webster]

            God is the supreme rector of the world. --Sir M.
                                                  Hale.
      [1913 Webster]

   2.
      (a) (Ch. of Eng.) A clergyman who has the charge and cure
          of a parish, and has the tithes, etc.; the clergyman
          of a parish where the tithes are not impropriate. See
          the Note under Vicar. --Blackstone.
      (b) (Prot. Epis. Ch.) A clergyman in charge of a parish.
          [1913 Webster]

   3. The head master of a public school. [Scot.]
      [1913 Webster]

   4. The chief elective officer of some universities, as in
      France and Scotland; sometimes, the head of a college; as,
      the Rector of Exeter College, or of Lincoln College, at
      Oxford.
      [1913 Webster]

   5. (R. C. Ch.) The superior officer or chief of a convent or
      religious house; and among the Jesuits the superior of a
      house that is a seminary or college.
      [1913 Webster]

WordNet (r) 3.0 (2006):

rector
    n 1: a person authorized to conduct religious worship;
         "clergymen are usually called ministers in Protestant
         churches" [syn: curate, minister of religion,
         minister, parson, pastor, rector]

Moby Thesaurus II by Grady Ward, 1.0:

88 Moby Thesaurus words for "rector":
   DD, Doctor of Divinity, Grand Penitentiary, Holy Father, Holy Joe,
   abbe, abuna, academic dean, administration, administrator, agent,
   antipope, archbishop, archdeacon, archpriest, bishop,
   bishop coadjutor, canon, cardinal, cardinal bishop,
   cardinal deacon, cardinal priest, chancellor, chaplain, churchman,
   clergyman, cleric, clerical, clerk, coadjutor, conductor, curate,
   cure, dean, dean of men, dean of women, deputy, diocesan,
   directeur, director, divine, ecclesiarch, ecclesiastic, exarch,
   governor, headmaster, headmistress, hierarch, high priest,
   impresario, intendant, man of God, manager, master, metropolitan,
   military chaplain, minister, padre, papa, parson, pastor,
   patriarch, penitentiary, pontiff, pope, prebendary, prelate,
   president, primate, principal, producer, provost,
   responsible person, reverend, rural dean, servant of God, shepherd,
   sky pilot, subdean, suffragan, supercargo, supply clergy,
   supply minister, the Reverend, the very Reverend, tonsured cleric,
   vicar, vice-chancellor



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

RECTOR, Eccl. law. One who rules or governs a name given to certain officers
of the Roman church. Dict. Canonique, h.v.



The Devil's Dictionary (1881-1906):

RECTOR, n.  In the Church of England, the Third Person of the
parochial Trinity, the Cruate and the Vicar being the other two.


U.S. Gazetteer Places (2000):

Rector, AR -- U.S. city in Arkansas
   Population (2000):    2017
   Housing Units (2000): 1045
   Land area (2000):     1.295506 sq. miles (3.355346 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.295506 sq. miles (3.355346 sq. km)
   FIPS code:            58490
   Located within:       Arkansas (AR), FIPS 05
   Location:             36.263320 N, 90.293464 W
   ZIP Codes (1990):     72461
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Rector, AR
    Rector