[hi.jack] vt [origin unknown] (1923) 1 a: to steal by stopping a vehicle on the highway b: to commandeer (a flying airplane) esp. by coercing the pilot at gunpoint c: to stop and steal from (a vehicle in transit) d: kidnap
2. a: to steal or rob as if by hijacking b: to subject to extortion or swindling -- hijack n -- hi.jack.er n