DICT.TW Dictionary Taiwan

 ring·lead·er /ˈrɪŋˌlidɚ/
 魁首

 Ring·lead·er n.
 1. The leader of a circle of dancers; hence, the leader of a number of persons acting together; the leader of a herd of animals.
    A primacy of order, such an one as the ringleader hath in a dance.   --Barrow.
 2. Opprobriously, a leader of a body of men engaged in the violation of law or in an illegal enterprise, as rioters, mutineers, or the like.
    The ringleaders were apprehended, tried, fined, and imprisoned.   --Macaulay.
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 ringleader
      n : a person who leads (especially in illicit activities)