1. things that have been collected or gathered together over time
Usage: plural form of accumulation
2. the processes of collecting or gathering things together
Usage: plural form of accumulation

Examples

• Snow accumulations of up to six inches are expected overnight.
• The garage was filled with accumulations of old newspapers and magazines.
• Dust accumulations on the shelves showed the house had been empty for months.
• The scientist studied ice accumulations in the polar regions.
• Years of accumulations in the attic made it difficult to find anything.
• Heavy accumulations of leaves blocked the storm drains.
• The museum displayed accumulations of artifacts from ancient civilizations.