from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To subject (an aircraft) to air piracy.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To steal or commandeer (hijack) an airplane, usually by threat of violence to the passengers.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. subject an aircraft to air piracy
sky + (hi)jack.(American Heritage® Dictionary of the English Language, Fourth Edition)
Blend of sky and highjack (Wiktionary)