Chasseur \Chas`seur"\, n. [F., a huntsman. See {Chase} to pursue.] 1. (Mil.) One of a body of light troops, cavalry or infantry, trained for rapid movements. [1913 Webster] 2. An attendant upon persons of rank or wealth, wearing a plume and sword. [1913 Webster] The great chasseur who had announced her arrival. --W. Irving. [1913 Webster]