Definition of "countervailing"

For every attribute that encourages diversity and decentralization on the Web, there is a countervailing push toward homogeneity and concentration.

2014, Astra Taylor, chapter 4, in The People's Platform: Taking Back Power and Culture in the Digital Age, Henry Holt and Company

We need countervailing action soon. Every day brings evidence that the mere prospect of Brexit is damaging a British economy that is in enough trouble already.

2017 July 16, William Keegan, “Election euphoria won’t last if Labour doesn’t foil Brexit folly”, in The Guardian‎

Trump, Kayleigh McEnany said, “makes hiring decisions based on the fact that he likes to have countervailing viewpoints … he likes the model of having a ‘team of rivals’ like what we saw in President Lincoln’s administration”.

2020 June 19, Martin Pengelly, quoting Kayleigh McEnany, “White House defends Bolton hiring as Trump administration tries to block book”, in The Guardian‎