Definitions for "Fusilier"
Formerly, a soldier armed with a fusil. Hence, in the plural:
(formerly) a British infantryman armed with a light flintlock musket
an infantryman
A title now borne by some regiments and companies; as, "The Royal Fusiliers," etc.
battalion Separate infantry battalion performing both reconnaissance and support in German division
Type of British infantry taking its name from the elite infantry regiments of old. Usually considered light infantry.