[1] : The Collaborative International Dictionary of English v.0.48

valentine \val"entine\, n.
   1. a sweetheart chosen on st. valentine's day.
      1913 webster

   2. a letter containing professions of love, or a missive of a
      sentimental, comic, or burlesque character, sent on st.
      valentine's day.
      1913 webster

   st. valentine's day, a day sacred to st. valentine; the
      14th of february. it was a very old notion, alluded to by
      shakespeare, that on this day birds begin to mate. hence,
      perhaps, arose the custom of sending love tokens at that
      time.
      1913 webster
see also:
st. valentine's day 

[2] : WordNet (r) 2.0

valentine
     n 1: a sweetheart chosen to receive a greeting on saint
          valentine's day; "will you be my valentine?"
     2: a card sent or given as to a sweetheart on saint
        valentine's day

[3] : U.S. Gazetteer (1990)

valentine, ne city, fips 49950
  location: 42.87368 n, 100.54990 w
  population 1990: 2826 1332 housing units
  area: 4.6 sq km land, 0.0 sq km water
  zip codes: 69201
valentine, tx town, fips 74648
  location: 30.58913 n, 104.49503 w
  population 1990: 217 121 housing units
  area: 1.2 sq km land, 0.0 sq km water
  zip codes: 79854

[4] : U.S. Gazetteer Places (2000)

valentine, ne -- u.s. city in nebraska
   population 2000:    2820
   housing units 2000: 1373
   land area 2000:     2.012706 sq. miles 5.212885 sq. km
   water area 2000:    0.002169 sq. miles 0.005617 sq. km
   total area 2000:    2.014875 sq. miles 5.218502 sq. km
   fips code:            49950
   located within:       nebraska ne, fips 31
   location:             42.873686 n, 100.550308 w
   zip codes 1990:     69201
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    valentine, ne
    valentine

[5] : U.S. Gazetteer Places (2000)

valentine, tx -- u.s. town in texas
   population 2000:    187
   housing units 2000: 138
   land area 2000:     0.481008 sq. miles 1.245805 sq. km
   water area 2000:    0.000000 sq. miles 0.000000 sq. km
   total area 2000:    0.481008 sq. miles 1.245805 sq. km
   fips code:            74648
   located within:       texas tx, fips 48
   location:             30.587504 n, 104.495498 w
   zip codes 1990:     79854
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    valentine, tx
    valentine

Valentine >> V Words
Valentine, definition of term: Valentine
valentine_pag1.html

Valentine Day >> V Words
Valentine Day, definition of term: Valentine Day
valentine+day_pag1.html

Saint Valentine >> S Words
Saint Valentine, definition of term: Saint Valentine
saint+valentine_pag1.html