The Collaborative International Dictionary of English v.0.48:

Tram \Tram\, n. [Sp. trama weft, or F. trame.]
   A silk thread formed of two or more threads twisted together,
   used especially for the weft, or cross threads, of the best
   quality of velvets and silk goods.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tram \Tram\, n. (Mech.)
   Same as Trammel, n., 6.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Tram \Tram\, v. t. [imp. & p. p. Trammed; p. pr. & vb. n.
   Tramming.]
   To convey or transport on a tramway or on a tram car.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Tram \Tram\, v. i.
   To operate, or conduct the business of, a tramway; to travel
   by tramway.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Tram \Tram\, n. [Prov. E. tram a coal wagon, the shaft of a cart
   or carriage, a beam or bar; probably of Scand, origin; cf.
   OSw. tr[*a]m, trum, a beam, OD. drom, Prov. & OHG. tram.]
   1. A four-wheeled truck running on rails, and used in a mine,
      as for carrying coal or ore.
      [1913 Webster]

   2. The shaft of a cart. [Prov. Eng.] --De Quincey.
      [1913 Webster]

   3. One of the rails of a tramway.
      [1913 Webster]

   4. A car on a horse railroad. [Eng.]
      [1913 Webster]

   Tram car, a car made to run on a tramway, especially a
      street railway car.

   Tram plate, a flat piece of iron laid down as a rail.

   Tram pot (Milling), the step and support for the lower end
      of the spindle of a millstone.
      [1913 Webster]

WordNet (r) 3.0 (2006):

tram
    n 1: a conveyance that transports passengers or freight in
         carriers suspended from cables and supported by a series of
         towers [syn: tramway, tram, aerial tramway, cable
         tramway, ropeway]
    2: a four-wheeled wagon that runs on tracks in a mine; "a
       tramcar carries coal out of a coal mine" [syn: tramcar,
       tram]
    3: a wheeled vehicle that runs on rails and is propelled by
       electricity [syn: streetcar, tram, tramcar, trolley,
       trolley car]
    v 1: travel by tram

Moby Thesaurus II by Grady Ward, 1.0:

50 Moby Thesaurus words for "tram":
   L, branch, cable railway, cog railway, el, electric, electric car,
   electric railway, elevated, elevated railway, embankment, feeder,
   feeder line, gravity-operated railway, horse railway, junction,
   light railroad, line, main line, metro, monorail, rack railway,
   rack-and-pinion railway, rail, rail line, railroad, railway,
   roadbed, roadway, sidetrack, siding, street railway, streetcar,
   streetcar line, subway, switchback, terminal, terminus, track,
   tramcar, tramline, trestle, trolley, trolley car, trolley line,
   trunk, trunk line, tube, turnout, underground