Definition of one-for-one in US English:

one-for-one

phrase

  • Denoting or referring to a situation or arrangement in which one thing corresponds to or is exchanged for another.

    ‘donations would be matched on a one-for-one basis with public revenues’
    • ‘He liked to trade punches with people, one for one.’
    • ‘It was one for one, and before Lyle could react, Dominic kicked him in the chest where he had just been hit, sending him flying.’
    • ‘An individual gene doesn't necessarily confer a trait, a kind of a one for one relationship, and the drug industry has been a bit disappointed by the pay-off from the human genome project so far.’
    • ‘To save time, the decision was made to simply replace lamps and ballasts on a one-for-one basis.’
    • ‘However, I don't see why we can't get a one for one replacement.’
    • ‘Even the simple one-for-one replacement of existing light sources with new, high efficiency sources will produce significant savings.’

Pronunciation

one-for-one

/ˌwənf(ə)rˈwən//ˌwənf(ə)rˈwən/