I. hi ‧ jack 1 /ˈhaɪdʒæk/ BrE AmE verb [transitive]
1 . to use violence or threats to take control of a plane, vehicle, or ship ⇨ carjack :
The airliner was hijacked by a group of terrorists.
2 . to take control of something and use it for your own purposes:
Some people think the party has been hijacked by right-wing extremists.
—hijacker noun [countable]
II. hijack 2 BrE AmE noun [countable]
British English when a plane, vehicle etc is hijacked