a person who has had long service or experience in an occupation, office, or the like: a veteran of the police force; a veteran of many sports competitions.
a person who has served in a military force, esp. one who has fought in a war: a Vietnam veteran.
—adj.
(of soldiers) having had service or experience in warfare: veteran troops.
experienced through long service or practice; having served for a long period: a veteran member of Congress.