progressive

favoring or promoting progress

(of taxes) adjusted so that the rate increases as the amount of income increases

Moving forward; proceeding onward; advancing; evincing progress; increasing; as, progressive motion or course; -- opposed to retrograde.

Of or pertaining to the Progressive party.

favoring or promoting reform (often by government action)

gradually advancing in extent

(of a card game or a dance) involving a series of sections for which the participants successively change place or relative position

advancing in severity

a tense of verbs used in describing action that is on-going

a person who favors a political philosophy of progress and reform and the protection of civil liberties