The Collaborative International Dictionary of English v.0.48:

Valhalla \Val*hal"la\, n. [Icel. valh["o]ll, literally, hall of
   the slain; valr the slain (akin to AS. w[ae]l, OHG. wal
   battlefield, wuol defeat, slaughter, AS. w[=o]l pestilence) +
   h["o]ll a royal hall. See Hall, and cf. Walhalla.]
   [Written also walhalla.]
   [1913 Webster]
   1. (Scand. Myth.) The palace of immortality, inhabited by the
      souls of heroes slain in battle.
      [1913 Webster]

   2. Fig.: A hall or temple adorned with statues and memorials
      of a nation's heroes; specifically, the Pantheon near
      Ratisbon, in Bavaria, consecrated to the illustrious dead
      of all Germany.
      [1913 Webster] Valiance

The Collaborative International Dictionary of English v.0.48:

Walhalla \Wal*hal"la\, n. [Cf. G. walhalla, See Valhalla.]
   See Valhalla.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Walhalla
    n 1: (Norse mythology) the hall in which the souls of heros
         slain in battle were received by Odin [syn: Valhalla,
         Walhalla]

U.S. Gazetteer Places (2000):

Walhalla, ND -- U.S. city in North Dakota
   Population (2000):    1057
   Housing Units (2000): 556
   Land area (2000):     1.052368 sq. miles (2.725621 sq. km)
   Water area (2000):    0.016797 sq. miles (0.043503 sq. km)
   Total area (2000):    1.069165 sq. miles (2.769124 sq. km)
   FIPS code:            82980
   Located within:       North Dakota (ND), FIPS 38
   Location:             48.921996 N, 97.918014 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Walhalla, ND
    Walhalla


U.S. Gazetteer Places (2000):

Walhalla, SC -- U.S. city in South Carolina
   Population (2000):    3801
   Housing Units (2000): 1705
   Land area (2000):     3.712746 sq. miles (9.615967 sq. km)
   Water area (2000):    0.045540 sq. miles (0.117948 sq. km)
   Total area (2000):    3.758286 sq. miles (9.733915 sq. km)
   FIPS code:            74095
   Located within:       South Carolina (SC), FIPS 45
   Location:             34.767263 N, 83.064321 W
   ZIP Codes (1990):     29691
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Walhalla, SC
    Walhalla