n. & adj. colloq.
--n. (pl. -os)
1. a large animal (esp. an elephant), person, or thing.
2 (in full jumbo jet) a large airliner with capacity for several hundred passengers.
Usage:
Usu. applied specifically to the Boeing 747.
--adj.
1. very large of its kind.
2 extra large (jumbo packet).
Etymology: 19th c. (orig. of a person): orig. unkn.: popularized as the name of a zoo elephant sold in 1882