/ prəˈgreʃn; NAmE / noun
1.
[ U , C ] progression (from sth) (to sth) the process of developing gradually from one stage or state to another :
opportunities for career progression
the rapid progression of the disease
a natural progression from childhood to adolescence
2.
[ C ] a number of things that come in a series
—see also arithmetic progression , geometric progression
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WORD ORIGIN
late Middle English : from Old French , from Latin progressio(n-) , from the verb progredi , from pro- forward + gradi to walk.