Definition of: hijack

(hī′jak′) v.t. U.S. Colloq.
1. To steal a shipment of (goods, bootleg liquor, etc.) by force.
2. To rob or steal (a truck, etc., carrying such goods).
3. To seize control of (an aircraft) while in flight by the threat or use of force and redirect it to a different destination; skyjack.
4. To rob, swindle, etc., by force or coercion. [Origin unknown]
—hi′jack′er noun