§337-1  Definitions.  Whenever used in this chapter:

     “Flight” and “fled” mean any voluntary or involuntary departure from the jurisdiction of the court where the proceedings hereinafter mentioned may have been instituted and are still pending, with the effect of avoiding, impeding, or delaying, the action of the court in which the proceedings may have been instituted or be pending, or any such departure from the state where the person demanded then was, if the person then was under detention by law as a person of unsound mind and subject to detention.

     “State” includes states, territories, districts, and insular and other possessions of the United States.

     As applied to a request to return any person within the purview of this chapter to or from the District of Columbia, the words “executive authority”, “governor”, and “chief magistrate”, respectively, include a justice of the supreme court of the District of Columbia and other authority.