Compaction is what happens when something is crushed or compressed. In many places, garbage undergoes compaction after it's collected, so that it takes up less space.

The process of making something more compact, or dense and very tightly packed together, is compaction. Geologists (scientists who study rocks and earth) might talk about the natural process of compaction, when sand or silt becomes denser and denser over time, as heavy material presses down on it. Computer scientists might instead think of data compaction, when data is simplified by removing information that's unnecessary or redundant.

Definitions of compaction

n the act of crushing

crunch, crush
grind, mill, pulverisation, pulverization
the act of grinding to a powder or dust
Type of:
compressing, compression
applying pressure

n an increase in the density of something

compression, concretion, densification
Type of:
an increase in density

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