The Collaborative International Dictionary of English v.0.48:

Luggage \Lug"gage\, n. [From 4th Lug.]
   That which is lugged; anything cumbrous and heavy to be
   carried; especially, a traveler's trunks, baggage, etc., or
   their contents.
   [1913 Webster]

         I am gathering up my luggage, and preparing for my
         journey.                                 --Swift.
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         What do you mean,
         To dote thus on such luggage!            --Shak.

   Syn: Plunder; baggage.
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   Luggage van, a vehicle for carrying luggage; a railway car,
      or compartment of a car, for carrying luggage. [Eng.]

   Luggage compartment, the compartment in a train, bus or
      other vehicle designed for storage of luggage during a
      journey. Separate from the passenger compartment.
      [1913 Webster +PJC]

The Collaborative International Dictionary of English v.0.48:

baggage \bag"gage\ (b[a^]g"g[asl]j), n. [F. bagage, from OF.
   bague bundle. In senses 6 and 7 cf. F. bagasse a prostitute.
   See Bag, n.]
   1. The clothes, tents, utensils, and provisions of an army.
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   Note: "The term itself is made to apply chiefly to articles
         of clothing and to small personal effects." --Farrow.
         [1913 Webster]

   2. The trunks, valises, satchels, etc., which a traveler
      carries with him on a journey; luggage.
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            The baronet's baggage on the roof of the coach.
                                                  --Thackeray.
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            We saw our baggage following below.   --Johnson.
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   Note: The English usually call this luggage.
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   3. Purulent matter. [Obs.] --Barrough.
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   4. Trashy talk. [Obs.] --Ascham.
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   5. A man of bad character. [Obs.] --Holland.
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   6. A woman of loose morals; a prostitute.
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            A disreputable, daring, laughing, painted French
            baggage.                              --Thackeray.
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   7. A romping, saucy girl. [Playful] --Goldsmith.
      [1913 Webster]

WordNet (r) 3.0 (2006):

luggage
    n 1: cases used to carry belongings when traveling [syn:
         baggage, luggage]

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "luggage":
   Gladstone, apparatus, attache case, backpack, bag, bag and baggage,
   baggage, bags, bandbox, belongings, briefcase, cargo, carpetbag,
   carryall, consignment, ditty bag, duffel, duffel bag, dunnage,
   flight bag, footlocker, freight, freightage, gear, goods, grip,
   handbag, haversack, holdall, impedimenta, kit, kit bag, knapsack,
   lading, load, outfit, overnight bag, pack, paraphernalia, payload,
   portmanteau, rucksack, satchel, sea bag, shipment, suitcase,
   tackle, things, tote bag, traps, traveling bag, trunk



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

LUGGAGE. Such things as are carried by a traveller, generally for his
personal accommodation; baggage. In England this word is generally used in
the same sense that baggage is used in the United States. See Baggage.