Entry 2 senses · 2 variants Webster, 1913 highjack · IPA v. t. n. 01 v. t. same as hijack. 1. same as hijack.[Rare] See: hijack Syn. commandeer, hijack, high-jack, pirate, expropriate. 02 n. Same as highjacking. 1. Same as highjacking. See: highjacking Syn. hijack.