[f. CAMPAIGN v. (or sb.) + -ER.] One who serves in a campaign; esp. one who has served in many campaigns, a veteran; also fig.
1771. Smollett, Humph. Cl. Both horse and rider were old campaigners, and stood without moving a muscle.
1815. Scott, Guy M., xi. I am an old campaigner, and perfectly used to it.
1858. Longf., Emperor’s Bird’s-n., vi. Forth the great campaigner came Slowly from his canvas palace.
