1. increasing or growing by successive additions
2. formed by the addition of new material to existing material

Examples

• The cumulative effect of small daily exercises improved her fitness significantly.
• Students receive cumulative grades that include all their work from the semester.
• The cumulative rainfall this month has been much higher than average.
• His cumulative experience in teaching spans over twenty years.
• The medication can have cumulative side effects if taken long-term.
• The company’s cumulative losses over three years forced them to restructure.
• Each test builds on cumulative knowledge from previous chapters.