The phrase
"concerted pressure" means a joint or combined effort to apply force or influence in a determined and organized way towards a particular goal or outcome.
Full definition
Abbott and other Liberals in seats around Sydney's North Shore are
under concerted pressure from the Broken Bay diocese.
If we start taking serious steps against global warming, the stage will be set for Europe and Japan to follow suit, and
for concerted pressure on the rest of the world as well.
We need coordinated,
concerted pressure.
But
the concerted pressure campaign against the speaker, which seemed to making her increasingly nervous as time went on, is over.
Similar results have been found whenever states subject schools to
concerted pressure - as in the case of high - stakes testing.