A person with long experience of a particular activity.
A group, animal, etc. with long experience of a particular activity.
A person who has served in the armed forces, especially an old soldier who has seen long service; also called a war veteran to distinguish from veterans who weren't in armed conflict.
Having had long experience, practice, or service.
Of or relating to former members of the military armed forces, especially those who served during wartime.
Anyone or anything that does a lot of work; something or someone who works consistently or regularly.
A horse used primarily for manual labor; a draft horse.