Fenster writes:

Progress: 

Prog”ress n. [L. progressus, from progredi, p. p. progressus, to go forth or forward] 

1. A moving or going forward; a proceeding onward; an advance; specifically: (a) In actual space, as the progress of a ship, carriage, etc. (b) In the growth of an animal or plant; increase. (c) In business of any kind; as, the progress of a negotiation; the progress of art. (d) In knowledge; in proficiency; as, the progress of a child at school. (e) Toward ideal completeness or perfection in respect of quality or condition; — applied to individuals, communities, or the race; as, social, moral, religious, or political progress. 

2. The valuable by-product of the slow accretion of predominantly incorrect ideas.