The Collaborative International Dictionary of English v.0.48:

Vesper \Ves"per\, a.
   Of or pertaining to the evening, or to the service of
   vespers; as, a vesper hymn; vesper bells.
   [1913 Webster]

   Vesper sparrow, the grass finch. See under Grass.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Vesper \Ves"per\ (v[e^]s"p[~e]r), n. [L., the evening, the
   evening star, the west; akin to Gr. "e`speros, "espe`ra, and
   perhaps to E. west. Cf. Hesperian, Vespers.]
   The evening star; Hesper; Venus, when seen after sunset;
   hence, the evening. --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Evening \E"ven*ing\, n. [AS. [=ae]fnung. See even, n., and cf.
   Eve.]
   1. The latter part and close of the day, and the beginning of
      darkness or night; properly, the decline of the day, or of
      the sun.
      [1913 Webster]

            In the ascending scale
            Of heaven, the stars that usher evening rose.
                                                  --Milton.
      [1913 Webster]

   Note: Sometimes, especially in the Southern parts of the
         United States, the afternoon is called evening.
         --Bartlett.
         [1913 Webster]

   2. The latter portion, as of life; the declining period, as
      of strength or glory.
      [1913 Webster]

   Note: Sometimes used adjectively; as, evening gun. "Evening
         Prayer." --Shak.
         [1913 Webster]

   Evening flower (Bot.), a genus of iridaceous plants
      (Hesperantha) from the Cape of Good Hope, with
      sword-shaped leaves, and sweet-scented flowers which
      expand in the evening.

   Evening grosbeak (Zo["o]l.), an American singing bird
      (Coccothraustes vespertina) having a very large bill.
      Its color is olivaceous, with the crown, wings, and tail
      black, and the under tail coverts yellow. So called
      because it sings in the evening.

   Evening primrose. See under Primrose.

   The evening star, the bright star of early evening in the
      western sky, soon passing below the horizon; specifically,
      the planet Venus; -- called also Vesper and Hesperus.
      During portions of the year, Mars, Jupiter, and Saturn are
      also evening stars. See Morning Star.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Vesper
    n 1: a planet (usually Venus) seen at sunset in the western sky
         [syn: evening star, Hesperus, Vesper]
    2: a late afternoon or evening worship service

Moby Thesaurus II by Grady Ward, 1.0:

61 Moby Thesaurus words for "vesper":
   Mass, bedtime prayer, camp meeting, church, church service,
   close of day, cockshut, compline, crepuscular, devotions,
   divine service, dusk, dusky, duty, eve, even, evening,
   evening devotions, evensong, eventide, exercises, grayness, lauds,
   liturgy, matins, meeting, morning devotions, night song, nightfall,
   none, nones, novena, office, praise meeting, prayer,
   prayer meeting, prayers, prime, prime song, public worship,
   revival, revival meeting, service, setting sun, sext, shut of day,
   sundown, sunset, sunsetty, tent meeting, the expiring day, tierce,
   twilight, twilighty, undersong, vespers, vespertine, vigils,
   watch meeting, watch night, watch-night service



U.S. Gazetteer Places (2000):

Vesper, WI -- U.S. village in Wisconsin
   Population (2000):    541
   Housing Units (2000): 243
   Land area (2000):     1.121954 sq. miles (2.905848 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.121954 sq. miles (2.905848 sq. km)
   FIPS code:            82650
   Located within:       Wisconsin (WI), FIPS 55
   Location:             44.481016 N, 89.967423 W
   ZIP Codes (1990):     54489
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Vesper, WI
    Vesper