The Collaborative International Dictionary of English v.0.48:

Fountain \Foun"tain\ (foun"t[i^]n), n. [F. fontaine, LL.
   fontana, fr. L. fons, fontis. See 2d Fount.]
   1. A spring of water issuing from the earth.
      [1913 Webster]

   2. An artificially produced jet or stream of water; also, the
      structure or works in which such a jet or stream rises or
      flows; a basin built and constantly supplied with pure
      water for drinking and other useful purposes, or for
      ornament.
      [1913 Webster]

   3. A reservoir or chamber to contain a liquid which can be
      conducted or drawn off as needed for use; as, the ink
      fountain in a printing press, etc.
      [1913 Webster]

   4. The source from which anything proceeds, or from which
      anything is supplied continuously; origin; source.
      [1913 Webster]

            Judea, the fountain of the gospel.    --Fuller.
      [1913 Webster]

            Author of all being,
            Fountain of light, thyself invisible. --Milton.
      [1913 Webster]

   Air fountain. See under Air.

   Fountain heead, primary source; original; first principle.
      --Young.

   Fountain inkstand, an inkstand having a continual supply of
      ink, as from elevated reservoir.

   Fountain lamp, a lamp fed with oil from an elevated
      reservoir.

   Fountain pen, a pen with a reservoir in the handle which
      furnishes a supply of ink.

   Fountain pump.
      (a) A structure for a fountain, having the form of a pump.
      (b) A portable garden pump which throws a jet, for
          watering plants, etc.

   Fountain shell (Zool.), the large West Indian conch shell
      (Strombus gigas).

   Fountain of youth, a mythical fountain whose waters were
      fabled to have the property of renewing youth.
      [1913 Webster]

WordNet (r) 3.0 (2006):

fountain
    n 1: a structure from which an artificially produced jet of
         water arises
    2: a natural flow of ground water [syn: spring, fountain,
       outflow, outpouring, natural spring]
    3: an artificially produced flow of water [syn: fountain,
       jet]
    4: a plumbing fixture that provides a flow of water [syn:
       fountain, fount]

Moby Thesaurus II by Grady Ward, 1.0:

110 Moby Thesaurus words for "fountain":
   anabasis, ascension, ascent, bob up, bonanza, break water, clamber,
   climb, climbing, cornucopia, elevation, escalade, float up, flush,
   fly up, font, fount, fountainhead, genesis, geyser, gold mine,
   gush, gyring up, headspring, headstream, headwater, inception,
   increase, jet, jump, jump up, leap, leap up, levitation, lode,
   mainspring, mine, mount, mounting, origin, pop up, provenance,
   provenience, quarry, resource, rise, rising, riverhead, rocket,
   rocketing up, root, rush, saltation, shoot up, shooting up,
   skyrocket, soaring, source, source of supply, spew, spit, spout,
   spouter, spray, spring, spring up, springhead, spritz, spurt,
   spurtle, squirt, staple, start up, surface, surge, takeoff,
   taking off, upclimb, upcoming, updraft, upgang, upgo, upgoing,
   upgrade, upgrowth, uphill, upleap, uplift, upping, uprisal, uprise,
   uprising, uprush, upshoot, upslope, upspear, upspring, upstart,
   upsurge, upsurgence, upsweep, upswing, vault, vault up, vein, well,
   wellhead, wellspring, whence, zooming



Easton's 1897 Bible Dictionary:

Fountain
   (Heb. 'ain; i.e., "eye" of the water desert), a natural source
   of living water. Palestine was a "land of brooks of water, of
   fountains, and depths that spring out of valleys and hills"
   (Deut. 8:7; 11:11).

     These fountains, bright sparkling "eyes" of the desert, are
   remarkable for their abundance and their beauty, especially on
   the west of Jordan. All the perennial rivers and streams of the
   country are supplied from fountains, and depend comparatively
   little on surface water. "Palestine is a country of mountains
   and hills, and it abounds in fountains of water. The murmur of
   these waters is heard in every dell, and the luxuriant foliage
   which surrounds them is seen in every plain." Besides its
   rain-water, its cisterns and fountains, Jerusalem had also an
   abundant supply of water in the magnificent reservoir called
   "Solomon's Pools" (q.v.), at the head of the Urtas valley,
   whence it was conveyed to the city by subterrean channels some
   10 miles in length. These have all been long ago destroyed, so
   that no water from the "Pools" now reaches Jerusalem. Only one
   fountain has been discovered at Jerusalem, the so-called
   "Virgins's Fountains," in the valley of Kidron; and only one
   well (Heb. beer), the Bir Eyub, also in the valley of Kidron,
   south of the King's Gardens, which has been dug through the
   solid rock. The inhabitants of Jerusalem are now mainly
   dependent on the winter rains, which they store in cisterns.
   (See WELL.)


U.S. Gazetteer Counties (2000):

Fountain -- U.S. County in Indiana
   Population (2000):    17954
   Housing Units (2000): 7692
   Land area (2000):     395.691364 sq. miles (1024.835884 sq. km)
   Water area (2000):    2.226423 sq. miles (5.766410 sq. km)
   Total area (2000):    397.917787 sq. miles (1030.602294 sq. km)
   Located within:       Indiana (IN), FIPS 18
   Location:             40.139160 N, 87.257568 W
   Headwords:
    Fountain
    Fountain, IN
    Fountain County
    Fountain County, IN


U.S. Gazetteer Places (2000):

Fountain, CO -- U.S. city in Colorado
   Population (2000):    15197
   Housing Units (2000): 5219
   Land area (2000):     13.997070 sq. miles (36.252243 sq. km)
   Water area (2000):    0.014924 sq. miles (0.038652 sq. km)
   Total area (2000):    14.011994 sq. miles (36.290895 sq. km)
   FIPS code:            27865
   Located within:       Colorado (CO), FIPS 08
   Location:             38.693787 N, 104.698156 W
   ZIP Codes (1990):     80817
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Fountain, CO
    Fountain


U.S. Gazetteer Places (2000):

Fountain, NC -- U.S. town in North Carolina
   Population (2000):    533
   Housing Units (2000): 246
   Land area (2000):     0.967525 sq. miles (2.505879 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.967525 sq. miles (2.505879 sq. km)
   FIPS code:            24440
   Located within:       North Carolina (NC), FIPS 37
   Location:             35.673637 N, 77.638959 W
   ZIP Codes (1990):     27829
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Fountain, NC
    Fountain


U.S. Gazetteer Places (2000):

Fountain, MI -- U.S. village in Michigan
   Population (2000):    175
   Housing Units (2000): 89
   Land area (2000):     1.007521 sq. miles (2.609467 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.007521 sq. miles (2.609467 sq. km)
   FIPS code:            29940
   Located within:       Michigan (MI), FIPS 26
   Location:             44.046035 N, 86.179332 W
   ZIP Codes (1990):     49410
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Fountain, MI
    Fountain


U.S. Gazetteer Places (2000):

Fountain, MN -- U.S. city in Minnesota
   Population (2000):    343
   Housing Units (2000): 137
   Land area (2000):     0.829750 sq. miles (2.149042 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.829750 sq. miles (2.149042 sq. km)
   FIPS code:            22094
   Located within:       Minnesota (MN), FIPS 27
   Location:             43.741439 N, 92.135527 W
   ZIP Codes (1990):     55935
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Fountain, MN
    Fountain