sky marshal

/skaɪ ˌmɑrʃəl/

Definitions of sky marshal

1. noun

   a person trained by the government in hijacking and terrorist tactics who (for security reasons) is a passenger aboard an airline flight
   synonyms: air marshal

   type of:

   marshal, marshall

   a law officer having duties similar to those of a sheriff in carrying out the judgments of a court of law