The Collaborative International Dictionary of English v.0.48:

Consul \Con"sul\ (k[o^]n"s[u^]l), n. [L., prob. fr. consulere to
   deliberate. See Consult.]
   1. (Rom. Antiq.) One of the two chief magistrates of the
      republic.
      [1913 Webster]

   Note: They were chosen annually, originally from the
         patricians only, but later from the plebeians also.
         [1913 Webster]

   2. A senator; a counselor. [Obs.]
      [1913 Webster]

            Many of the consuls, raised and met,
            Are at the duke's already.            --Shak.
      [1913 Webster]

            With kings and consuls of the earth.  --Job. iii. 14
                                                  (Douay Ver. )
      [1913 Webster]

   3. (Fr. Hist.) One of the three chief magistrates of France
      from 1799 to 1804, who were called, respectively, first,
      second, and third consul.
      [1913 Webster]

   4. An official commissioned to reside in some foreign
      country, to care for the commercial interests of the
      citizens of the appointing government, and to protect its
      seamen.
      [1913 Webster]

   Consul general, a consul of the first rank, stationed in an
      important place, or having jurisdiction in several places
      or over several consuls.

   Vice consul, a consular officer holding the place of a
      consul during the consul's absence or after he has been
      relieved.
      [1913 Webster]

WordNet (r) 3.0 (2006):

consul
    n 1: a diplomat appointed by a government to protect its
         commercial interests and help its citizens in a foreign
         country

The Free On-line Dictionary of Computing (19 January 2023):

Consul

    A constraint-based declarative language based on
   axiomatic set theory and designed for parallel execution on
   MIMD architectures.  Consul's fundamental data type is the
   set and its fundamental operators are the logical
   connectives ("and", "or", "not") and quantifiers ("forall",
   "exists").  It is written in Lisp-like syntax, e.g.,

    (plus x y z)

   which means the relation x = y+z (not an assignment statement).

   ["Design of the CONSUL Programming Language", D. Baldwin,
   C. A. Quiroz Gonzalez, University of Rochester. Computer Science
   Department, TR208, 1987 Feb (http://hdl.handle.net/1802/6372)]

   ["Consul: A Parallel Constraint Language", D. Baldwin, IEEE
   Software 6(4):62-71, 1989 July
   (http://dx.doi.org/10.1109/52.31653)]

   (2014-10-04)


The Devil's Dictionary (1881-1906):

CONSUL, n.  In American politics, a person who having failed to secure
and office from the people is given one by the Administration on
condition that he leave the country.