say it: jen-eh-ruh-LIS-i-moh
generalissimo is a noun meaning "the officer who holds the supreme command". It carries one recorded sense.
the officer who holds the supreme command
“in the U.S. the president is the commander in chief”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for generalissimo come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.