1. the process of pressing or squeezing something together to make it more dense or solid
2. the state of being compressed or made more dense

Examples

• The compaction of soil makes it difficult for plant roots to penetrate.
• Heavy machinery caused compaction of the ground at the construction site.
• Snow compaction occurs naturally as layers accumulate over time.
• The compaction process reduces the volume of waste in landfills.
• Road crews use rollers for asphalt compaction.
• Compaction of sediments over millions of years forms sedimentary rock.
• The engineer measured soil compaction before building the foundation.