Informally, a large transport aircraft, especially the Boeing 747.(noun)
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Use "jumbo jet" in a sentence
"Audley was suddenly aware that he was trying to out-shout a jumbo jet which had stolen up on him and now seemed to be passing ten feet above his head."
"The staff at the resort would long recall the night a dark 747 jumbo jet touched down unannounced on their airstrip and performed a brilliant short-runway landing procedure."
"Boeing is trying to finalize at least one order for its 747-8, an updated version of the original jumbo jet that will be making its maiden air-show trip."