Definitions of boss:

• noun:   a person responsible for hiring workers

  Example: "The boss hired three more men for the new job"

• noun:   a person who exercises control and makes decisions

  Example: "He is his own boss now"

• noun:   a circular rounded projection or protuberance
• noun:   a leader in a political party who controls votes and dictates appointments

  Example: "Party bosses have a reputation for corruption"

• noun:   a person who exercises control over workers
• verb:   raise in a relief

  Example: "Embossed stationary"

• adjective:   exceptionally good

  Example: "A boss hand at carpentry"

• name:  A surname (rare: 1 in 33333 families; popularity rank in the U.S.: #3714)