- a very large person, animal, or thing.
- jumbo jet.
- U.S. Nautical.
- a forestaysail having a boom (jum·bo boom ) along its foot, used especially on schooners.
- a sail used in place of a course on a square-rigged ship, having the form of an isosceles triangle set apex downward.
- a narrow triangular sail set point downward in place of a foresail on a topsail schooner.
- very large: the jumbo box of cereal.
- informal
- a very large person or thing
- (as modifier)
- See jumbo jet
