Generalissimo

n.

1.

The chief commander of an army; especially, the commander in chief of an army consisting of two or more grand divisions under separate commanders; - a title used in most foreign countries.

Noun

1.

generalissimo - the officer who holds the supreme command; "in the U.S. the president is the commander in chief" Synonyms: commander in chief

commandant, commander, commander in chief, commanding officer