1. A powerful horse ridden in battle by a knight, cavalry officer, etc.; a charger. Now hist.
a. A veteran of many military or political campaigns, or (later) sporting contests; an experienced and dependable soldier, politician, or player. Also: an experienced former soldier. Cf. old soldier n. 1.
b. A person who is very experienced in a role, position, or activity; (originally) spec. an experienced stage actor. Cf. old soldier n. 1b, old stager at stager n. 1a.
d. A play, song, piece of music, etc., which is frequently performed and has become very familiar, and (typically) enduringly popular. Also more generally: anything which is very familiar.
e. A reliable and much-used tool, device, piece of equipment, etc.
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