The phrase "tacit support" means showing approval or endorsement of something without expressing it openly or directly. It implies a silent agreement or support without any verbal or written declaration. Full definition
In an open letter to her school community five days after the Charlottesville incident, Ms. Moskowitz wrote that «some have perceived my silence as tacit support of President Trump's policies,» and that in retrospect she believes she should have spoken out sooner. (csmonitor.com)
So the kind of tacit support for investment in education that Mr Martin was calling for is certainly a matter of social responsibility. (canadianbusiness.com)
How can we continue to make the case to charter skeptics that we are not a stalking horse for privatization if we give tacit support for education vouchers? (c3s.nyc)