kəmˈpakshən, käm- noun
( -s )
Etymology: Middle English compaccion, from Latin compaction-, compactio, from compactus (past participle of compingere to join) + -ion-, -io -ion — more at compact
: the act or action of compacting or being compacted
the compaction of all this material into a single volume — Natural History
a second evil of severe grazing … is compaction of the soil surface by trampling — Conservation & Nevada