a style of rock music that emerged in the 1970s; associated with attempts to combine rock with jazz and other forms; intended for listening and not dancing
favoring or promoting progress
favoring or promoting reform (often by government action)
(of taxes) adjusted so that the rate increases as the amount of income increases
a person who favors a political philosophy of progress and reform and the protection of civil liberties
gradually advancing in extent
a lump or mass of hard consolidated mineral matter
material consisting of the aggregate of minerals like those making up the Earth's crust
