pro ‧ gres ‧ sion /prəˈɡreʃ ə n/ BrE AmE noun
[ Word Family: noun : ↑ progress , ↑ progression , ↑ progressive ; verb : ↑ progress ; adverb : ↑ progressively ; adjective : ↑ progressive ]
1 . [singular, uncountable] a gradual process of change or development
progression of
the natural progression of the disease
progression through
his career progression through the organization
progression from/to
the logical progression from accountant to financial controller
progression towards
Europe’s progression towards economic and monetary union
2 . [countable] a number of things coming one after the other
⇨ ↑ arithmetic progression , ↑ geometric progression