Very large airliner (5,3)
(Other definitions for jumbo jet that I've seen before include "Flier" , "Big plane" , "Large aircraft" , "Large airliner" , "Large aeroplane" .)
(Other definitions for jumbo that I've seen before include "Very large, airliner" , "Elephant - large - jet" , "Huge and bulky" , "Unusually large" , "monster" .)