Veteran

Part of speech: noun (n.)

One who has been long exercised in any service or art, particularly in war; one who has had. Ensigns that pierced the foe's remotest lines, The hardy veteran with tears resigns. Addison.

Part of speech: adjective (a.)

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. The insinuating eloquence and delicate flattery of veteran diplomatists and courtiers. Macaulay.