definition of
progression

[1] #1 progression n. [patterned advance] a series with a definite pattern of advance. wn

[2] #2 progression n. [progress, advance] a movement forward; "he listened for the progress of the troops". wn

[3] #3 progression n. [progress, procession, advance, advancement, forward motion, onward motion] the act of moving forward (as toward a goal). wn