What is the meaning of chief?

noun

• A person who is in charge.
  • usage: "the head of the whole operation"
  • synonyms: head, top dog
• A person who exercises control over workers.
  • usage: "if you want to leave early you have to ask the foreman"
  • synonyms: foreman, gaffer, honcho, boss
• The head of a tribe or clan.
  • synonyms: headman, tribal chief, chieftain

adjective

• Most important element.
  • usage: "the chief aim of living"; "the main doors were of solid glass"; "the principal rivers of America"; "the principal example"; "policemen were primary targets"; "the master bedroom"; "a master switch"
  • synonyms: main, primary, principal, master