[Fr.; f. franc free (see FRANK a.) + tireur shooter, f. tirer to shoot.] One of a corps of light infantry, originating in the wars of the French Revolution, and having an organization distinct from that of the regular army.

1

1870.  Daily News, 3 Oct. All the volunteers, whether called Francs-tireurs or National Guards … will … be embodied in one regular army.

2