The Collaborative International Dictionary of English v.0.48:

Commerce \Com*merce"\ (? or ?), v. i. [imp. & p. p. Commerced;
   p. pr. & vb. n. Commercing.] [Cf. F. commercer, fr. LL.
   commerciare.]
   1. To carry on trade; to traffic. [Obs.]
      [1913 Webster]

            Beware you commerce not with bankrupts. --B. Jonson.
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   2. To hold intercourse; to commune. --Milton.
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            Commercing with himself.              --Tennyson.
      [1913 Webster]

            Musicians . . . taught the people in angelic
            harmonies to commerce with heaven.    --Prof.
                                                  Wilson.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Commerce \Com"merce\, n.

   Note: (Formerly accented on the second syllable.) [F.
         commerce, L. commercium; com- + merx, mercis,
         merchandise. See Merchant.]
   1. The exchange or buying and selling of commodities; esp.
      the exchange of merchandise, on a large scale, between
      different places or communities; extended trade or
      traffic.
      [1913 Webster]

            The public becomes powerful in proportion to the
            opulence and extensive commerce of private men.
                                                  --Hume.
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   2. Social intercourse; the dealings of one person or class in
      society with another; familiarity.
      [1913 Webster]

            Fifteen years of thought, observation, and commerce
            with the world had made him [Bunyan] wiser.
                                                  --Macaulay.
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   3. Sexual intercourse. --W. Montagu.
      [1913 Webster]

   4. A round game at cards, in which the cards are subject to
      exchange, barter, or trade. --Hoyle.
      [1913 Webster]

   Chamber of commerce. See Chamber.

   Syn: Trade; traffic; dealings; intercourse; interchange;
        communion; communication.
        [1913 Webster]

WordNet (r) 3.0 (2006):

commerce
    n 1: transactions (sales and purchases) having the objective of
         supplying commodities (goods and services) [syn:
         commerce, commercialism, mercantilism]
    2: the United States federal department that promotes and
       administers domestic and foreign trade (including management
       of the census and the patent office); created in 1913 [syn:
       Department of Commerce, Commerce Department, Commerce,
       DoC]
    3: social exchange, especially of opinions, attitudes, etc.

Moby Thesaurus II by Grady Ward, 1.0:

110 Moby Thesaurus words for "commerce":
   ESP, act of love, activities, activity, adultery, affair, affairs,
   answer, aphrodisia, ass, bag, balling, basis, business,
   carnal knowledge, climax, cohabitation, coition, coitus,
   coitus interruptus, collegiality, communication, communion,
   community, concern, concernment, congress, connection, contact,
   conversation, converse, copula, copulation, correspondence,
   coupling, dealing, dealings, diddling, employ, employment,
   enterprise, exchange, fellowship, fornication, function, industry,
   information, interaction, interchange, intercommunication,
   intercommunion, intercourse, interest, interplay, intimacy, labor,
   linguistic intercourse, lookout, lovemaking, making it with,
   marital relations, marketing, marriage act, mating, matter, meat,
   mercantilism, merchandising, message, occupation, onanism, orgasm,
   ovum, pareunia, procreation, relations, reply, response, screwing,
   service, sex, sex act, sexual climax, sexual commerce,
   sexual congress, sexual intercourse, sexual relations,
   sexual union, sleeping with, social activity, social intercourse,
   social relations, speaking, speech, speech circuit,
   speech situation, sperm, takeoff, talking, telepathy, thing, touch,
   trade, traffic, trafficking, truck, two-way communication,
   undertaking, venery, work



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

COMMERCE, trade, contracts. The exchange of commodities for commodities;
considered in a legal point of view, it consists in the various agreements
which have for their object to facilitate the exchange of the products of
the earth or industry of man, with an intent to realize a profit. Pard. Dr.
Coin. n. 1. In a narrower sense, commerce signifies any reciprocal
agreements between two persons, by which one delivers to the other a thing,
which the latter accepts, and for which he pays a consideration; if the
consideration be money, it is called a sale; if any other thing than money,
it is called exchange or barter. Domat, Dr. Pub. liv. 1, tit. 7, s. 1, n. 2.
Congress have power by the constitution to regulate commerce with foreign
nations and among the several states, and with the Indian tribes. 1 Kent.
431; Story on Const. Sec. 1052, et seq. The sense in which the word commerce
is used in the constitution seems not only to include traffic, but
intercourse and navigation. Story, Sec. 1057; 9 Wheat. 190, 191, 215, 229; 1
Tuck. Bl. App. 249 to 252. Vide 17 John. R. 488; 4 John. Ch. R. 150; 6 John.
Ch. R. 300; 1 Halst. R. 285; Id. 236; 3 Cowen R. 713; 12 Wheat. R. 419; 1
Brock. R. 423; 11 Pet. R. 102; 6 Cowen, R. 169; 3 Dana, R. 274; 6 Pet. R.
515; 13 S. & R. 205.



The Devil's Dictionary (1881-1906):

COMMERCE, n.  A kind of transaction in which A plunders from B the
goods of C, and for compensation B picks the pocket of D of money
belonging to E.


U.S. Gazetteer Places (2000):

Commerce, CA -- U.S. city in California
   Population (2000):    12568
   Housing Units (2000): 3377
   Land area (2000):     6.567812 sq. miles (17.010555 sq. km)
   Water area (2000):    0.004868 sq. miles (0.012607 sq. km)
   Total area (2000):    6.572680 sq. miles (17.023162 sq. km)
   FIPS code:            14974
   Located within:       California (CA), FIPS 06
   Location:             34.000613 N, 118.154781 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Commerce, CA
    Commerce


U.S. Gazetteer Places (2000):

Commerce, GA -- U.S. city in Georgia
   Population (2000):    5292
   Housing Units (2000): 2273
   Land area (2000):     8.303967 sq. miles (21.507176 sq. km)
   Water area (2000):    0.006680 sq. miles (0.017300 sq. km)
   Total area (2000):    8.310647 sq. miles (21.524476 sq. km)
   FIPS code:            19112
   Located within:       Georgia (GA), FIPS 13
   Location:             34.206520 N, 83.461203 W
   ZIP Codes (1990):     30529
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Commerce, GA
    Commerce


U.S. Gazetteer Places (2000):

Commerce, OK -- U.S. city in Oklahoma
   Population (2000):    2645
   Housing Units (2000): 1079
   Land area (2000):     0.818331 sq. miles (2.119467 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.818331 sq. miles (2.119467 sq. km)
   FIPS code:            16500
   Located within:       Oklahoma (OK), FIPS 40
   Location:             36.933529 N, 94.871371 W
   ZIP Codes (1990):     74339
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Commerce, OK
    Commerce


U.S. Gazetteer Places (2000):

Commerce, TX -- U.S. city in Texas
   Population (2000):    7669
   Housing Units (2000): 3405
   Land area (2000):     6.480944 sq. miles (16.785567 sq. km)
   Water area (2000):    0.056332 sq. miles (0.145900 sq. km)
   Total area (2000):    6.537276 sq. miles (16.931467 sq. km)
   FIPS code:            16240
   Located within:       Texas (TX), FIPS 48
   Location:             33.244959 N, 95.899957 W
   ZIP Codes (1990):     75428
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Commerce, TX
    Commerce


U.S. Gazetteer Places (2000):

Commerce, MO -- U.S. village in Missouri
   Population (2000):    110
   Housing Units (2000): 49
   Land area (2000):     0.319731 sq. miles (0.828100 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.319731 sq. miles (0.828100 sq. km)
   FIPS code:            15760
   Located within:       Missouri (MO), FIPS 29
   Location:             37.157131 N, 89.446512 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Commerce, MO
    Commerce