Noun highjacker has 2 senses
  1. highjacker, hijacker - someone who uses force to take over a vehicle (especially an airplane) in order to reach an alternative destination
    --1 is a kind of criminal, felon, crook, outlaw, malefactor
    Derived form: verb highjack1
  2. highjacker, highwayman, hijacker, road agent - a holdup man who stops a vehicle and steals from it
    --2 is a kind of holdup man, stickup man
    --2 has particulars: footpad, padder; Turpin, Dick Turpin
    Derived form: verb highjack1