Definition of one-down in English:

one-down

adjective

informal
  • At a disadvantage in a game or a competitive situation.

    ‘a one-down position’
    • ‘Torrance clearly believes in Potter's First Law of Gamesmanship: if you are not one-up, then you are one-down.’
    • ‘England have for years started one-down whenever the opponents were Australia, no matter what the sport.’
    • ‘This was his first Test in over a year, and his 15th at the problematic one-down position.’
    • ‘The classic example is ‘men don't ask for directions’; to do so frames them as one-down, a person needing help, and the direction-giver as one-up, a person with superior knowledge.’

Pronunciation:

one-down

/ˌwənˈdoun/