'Generalissimo' definitions:

Definition of 'generalissimo'

From: WordNet
noun
The officer who holds the supreme command; "in the U.S. the president is the commander in chief" [syn: commander in chief, generalissimo]

Definition of 'Generalissimo'

From: GCIDE
  • Generalissimo \Gen`er*al*is"si*mo\, n. [It., superl. of generale general. See General, a.] 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. [1913 Webster]