Moving forward; advancing. Proceeding in steps; continuing steadily by increments: progressive change. Promoting or favoring progress toward better conditions or new policies, ideas, or methods: a progressive politician; progressive business leadership. Of or relating to a Progressive Party: the Progressive platform of 1924. Of or relating to progressive education: a progressive school. Increasing in rate as the taxable amount increases: a progressive income tax. Pathology Tending to become more severe or wider in scope: progressive paralysis. Grammar Designating a verb form that expresses an action or condition in progress. A person who actively favors or strives for progress toward better conditions, as in society or government. A member or supporter of a Progressive Party. Grammar A progressive verb form.