The Collaborative International Dictionary of English v.0.48:

Veteran \Vet"er*an\ (v[e^]t"[~e]r*an), a. [L. veteranus, from
   vetus, veteris, old; akin to Gr. 'e`tos year, Skr. vatsara.
   See Wether.]
   Long exercised in anything, especially in military life and
   the duties of a soldier; long practiced or experienced; as, a
   veteran officer or soldier; veteran skill.
   [1913 Webster]

         The insinuating eloquence and delicate flattery of
         veteran diplomatists and courtiers.      --Macaulay.
   [1913 Webster]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Veteran \Vet"er*an\ (v[e^]t"[~e]r*an), n. [L. veteranus (sc.
   miles): cf. F. v['e]t['e]ran.]
   One who has been long exercised in any service or art,
   particularly in war; one who has had much experience, or has
   grown old or decrepit in service.
   [1913 Webster]

         Ensigns that pierced the foe's remotest lines,
         The hardy veteran with tears resigns.    --Addison.
   [1913 Webster]

   Note: In the United States, during the civil war, soldiers
         who had served through one term of enlistment and had
         reenlisted were specifically designated veterans.
         [1913 Webster]

WordNet (r) 3.0 (2006):

veteran
    adj 1: rendered competent through trial and experience; "a
           seasoned traveler"; "veteran steadiness"; "a veteran
           officer" [syn: seasoned, veteran(a)]
    n 1: a serviceman who has seen considerable active service; "the
         veterans laughed at the new recruits" [syn: veteran,
         veteran soldier]
    2: a person who has served in the armed forces [syn: veteran,
       vet, ex-serviceman]
    3: an experienced person who has been through many battles;
       someone who has given long service [syn: veteran, old-
       timer, oldtimer, old hand, warhorse, old stager,
       stager]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "veteran":
   Father Time, Methuselah, Nestor, Old Paar, blase, campaigner,
   centenarian, cosmopolitan, cosmopolite, dotard, elder, experienced,
   expert, gaffer, geezer, golden-ager, gramps, grandfather,
   grandsire, graybeard, knowing, master, mature, matured,
   nonagenarian, not born yesterday, octogenarian, old,
   old campaigner, old chap, old codger, old dog, old duffer,
   old geezer, old gent, old gentleman, old hand, old man, old party,
   old pro, old salt, old sea dog, old soldier, old-time, old-timer,
   older, oldster, pantaloon, past master, patriarch, practical,
   practiced, presbyter, ripe, ripened, sagacious, salt, seasoned,
   seasoned veteran, senior citizen, septuagenarian, sexagenarian,
   shellback, skilled, sophisticated, the quiet-voiced elders, tried,
   tried and true, trouper, venerable sir, versed, vet, war-horse,
   warhorse, wise, world-wise, worldly, worldly-wise



U.S. Gazetteer Places (2000):

Veteran, WY -- U.S. Census Designated Place in Wyoming
   Population (2000):    28
   Housing Units (2000): 16
   Land area (2000):     1.338599 sq. miles (3.466955 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.338599 sq. miles (3.466955 sq. km)
   FIPS code:            80285
   Located within:       Wyoming (WY), FIPS 56
   Location:             41.961700 N, 104.381436 W
   ZIP Codes (1990):     82243
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Veteran, WY
    Veteran