say it: pruh-GRESH-uhn
progression is a noun meaning "a series with a definite pattern of advance". It carries 3 recorded senses.
a series with a definite pattern of advance
a movement forward
“he listened for the progress of the troops”
the act of moving forward (as toward a goal)
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for progression come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.