The Collaborative International Dictionary of English v.0.48:

Heron \Her"on\, n. [OE. heiroun, heroun, heron, hern, OF.
   hairon, F. h['e]ron, OHG. heigir; cf. Icel. hegri, Dan.
   heire, Sw. h[aum]ger, and also G. h[aum]her jay, jackdaw,
   OHG. hehara, higere, woodpecker, magpie, D. reiger heron, G.
   reiher, AS. hr[=a]gra. Cf. Aigret, Egret.] (Zool.)
   Any wading bird of the genus Ardea and allied genera, of
   the family Ardeid[ae]. The herons have a long, sharp bill,
   and long legs and toes, with the claw of the middle toe
   toothed. The common European heron (Ardea cinerea) is
   remarkable for its directly ascending flight, and was
   formerly hunted with the larger falcons.
   [1913 Webster]

   Note: There are several common American species; as, the
         great blue heron (Ardea herodias); the little blue
         (Ardea c[oe]rulea); the green (Ardea virescens);
         the snowy (Ardea candidissima); the night heron or
         qua-bird (Nycticorax nycticorax). The plumed herons
         are called egrets.
         [1913 Webster]

   Heron's bill (Bot.), a plant of the genus Erodium; -- so
      called from the fancied resemblance of the fruit to the
      head and beak of the heron.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Heron
    n 1: Greek mathematician and inventor who devised a way to
         determine the area of a triangle and who described various
         mechanical devices (first century) [syn: Hero, Heron,
         Hero of Alexandria]
    2: grey or white wading bird with long neck and long legs and
       (usually) long bill

Easton's 1897 Bible Dictionary:

Heron
   (Lev. 11:19; Deut. 14:18), ranked among the unclean birds. The
   Hebrew name is _'anaphah_, and indicates that the bird so named
   is remarkable for its angry disposition. "The herons are
   wading-birds, peculiarly irritable, remarkable for their
   voracity, frequenting marshes and oozy rivers, and spread over
   the regions of the East." The Ardea russeta, or little golden
   egret, is the commonest species in Asia.


U.S. Gazetteer Places (2000):

Heron, MT -- U.S. Census Designated Place in Montana
   Population (2000):    149
   Housing Units (2000): 63
   Land area (2000):     3.392157 sq. miles (8.785645 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    3.392157 sq. miles (8.785645 sq. km)
   FIPS code:            35875
   Located within:       Montana (MT), FIPS 30
   Location:             48.057437 N, 115.960373 W
   ZIP Codes (1990):     59844
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Heron, MT
    Heron