combi UK /ˈkɒmbi/US /ˈkɑmbi/ noun3 •An aircraft adapted to carry either cargo or passengers, or both at once. •Ellipsis of combi boiler.The combi at our last place was just fine for rads and showers. The biggest restriction was the speed of filling the bath... — 2013 •[before a noun] Clipping of combination.My old combi boiler broke down. formscombies · combis