Definition of up adjective from the Oxford Advanced American Dictionary

     

    up

     adjective
    adjective
    NAmE//ʌp//
     
     
    jump to other results
  1. 1[only before noun] directed or moving upward an up stroke the up escalator
  2. 2 [not before noun] (informal) cheerful; happy or excited The mood here is really up.
  3. 3[not before noun] having your turn at something; taking its place in the order of things Are you ready? You're up next. First up, a report on baseball's bright new star Stephen Strasburg.
  4. 4[not before noun] (of a computer system) working Our system should be up by this afternoon.
See the Oxford Advanced Learner's Dictionary entry: up