This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Chiefly British One who is highest in authority or command, as of an organization.

n. The most important person in an organization.

n. the most important person in an organization

"The supremo is your standard super; the gigante looks ... well, gigantic."

big fish    big cheese    big wheel    big deal    head honcho   

triunfo    asunto    taedium    ederet    ification