The Collaborative International Dictionary of English v.0.48:

Campion \Cam"pi*on\, n. [Prob. fr. L. campus field.] (Bot.)
   A plant of the Pink family (Cucubalus bacciferus), bearing
   berries regarded as poisonous.
   [1913 Webster]

   Bladder campion, a plant of the Pink family (Cucubalus
      Behen or Silene inflata), having a much inflated calyx.
      See Behen.

   Rose campion, a garden plant (Lychnis coronaria) with
      handsome crimson flowers.
      [1913 Webster]

WordNet (r) 3.0 (2006):

campion
    n 1: any plant of the genus Silene [syn: silene, campion,
         catchfly]

U.S. Gazetteer Places (2000):

Campion, CO -- U.S. Census Designated Place in Colorado
   Population (2000):    1832
   Housing Units (2000): 653
   Land area (2000):     3.773716 sq. miles (9.773880 sq. km)
   Water area (2000):    0.022472 sq. miles (0.058203 sq. km)
   Total area (2000):    3.796188 sq. miles (9.832083 sq. km)
   FIPS code:            11590
   Located within:       Colorado (CO), FIPS 08
   Location:             40.348257 N, 105.089095 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Campion, CO
    Campion