Definition of super-jumbo in US English:

super-jumbo

adjective

US
  • 1Much bigger than is standard or usual; extremely large.

  • 2Specifically. Of a jet aircraft: that is a super-jumbo.

noun

US
  • 1Anything notably large in size, especially something (usually a commercial product) significantly larger than is standard or usual.

  • 2Specifically. A (proposed) passenger aircraft that is bigger than a jumbo jet, typically containing between five hundred and one thousand seats.

Origin

1920s. From super- + jumbo.

Pronunciation

super-jumbo

/ˌs(j)uːpəˈdʒʌmbəʊ/