- 1having a result that increases in strength or importance each time more of something is added the cumulative effect of human activity on the world environment The evolution of human life was a gradual, cumulative process.
- 2including all the amounts that have been added previously the monthly sales figures and the cumulative total for the past six months
adverb Cumulatively, these archaeological discoveries give a very clear picture of Celtic life.See cumulative in the Oxford Advanced Learner's Dictionary
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