Noun
(aviation) An aircraft powered by three jet engines.
(physics) Three jets of particles from an event or source.
Source: en.wiktionary.orgThe 767-100 was ultimately not offered for sale, as its capacity was too close to the 757's seating, while the 777 trijet was eventually dropped in favor of standardizing around the twinjet configuration. Source: Internet
The 747 trijet would have had more payload, range, and passenger capacity than the L-1011 and DC-10. Source: Internet