D defs.my
Entry 2 senses Webster, 1913

Ringleader

/rĭng'-lēdˌ-ẽr/ · Ring·lead·er · IPA /ˈɹɪŋˌliːdəɹ/
01 n. The leader of a circle of dancers; hence, the leader of a number of persons acting together; the leader of a herd of animals.
  1. 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. 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.