|Origin:||, past participle of accumulare, from ad- 'to' + cumulare 'to pile up'|
to gradually get more and more money, possessions, knowledge etc over a period of time:
It is unjust that a privileged few should continue to accumulate wealth.
to gradually increase in numbers or amount until there is a large quantity in one place:
Fat tends to accumulate around the hips and thighs.
—accumulation noun [uncountable and countable]
the accumulation of data