ETYM Cf; French graduel. Related to Grade, Gradual.
1. Of a topographical gradient; not steep or abrupt.
2. Proceeding in small stages.

ETYM Cf. French progressif.
1. Gradually advancing in extent.
2. Favoring or promoting progress.
3. Advancing in severity.
4. Favoring or promoting reform (often by government action); SYN. reformist.
5. (Of taxes) Adjusted so that the rate increases as the amount increases.