progressivist adjective 1noun 1forms 3 adjective1 •Relating to progressivism; progressive.The conservative movement, having adopted big-tent pseudo-conservatism, will generally resist progressivist impulses for a time. — 2017 noun1 •An advocate of progressivism.Discontented progressivists may be persuaded to cross the aisle in small numbers, but the big tent lacks the universal message it needs to persuade effectively. — 2017 formsprogressivists · more progressivist · most progressivist