[ kuhm-pak-shuhn, kom- ]


  1. the act of compacting compact or the state of being compacted. compact.
  2. Geology. the consolidation of sediments resulting from the weight of overlying deposits.


/ kəm-păkshən /

  1. The process by which the porosity of a given form of sediment is decreased as a result of its mineral grains being squeezed together by the weight of overlying sediment or by mechanical means.

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Word History and Origins

Origin of compaction1

1350–1400; Middle English compaccioun < Latin compāctiōn- (stem of compāctiō ) a joining, frame, equivalent to compāct ( us ) compact 1 + -iōn- -ion

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Example Sentences

Chernozems’ fluffiness might put it at greater risk of compaction, but it can also help the soil spring back afterward, helping prevent it from becoming a longer-term problem.

For all but the worst compaction, though, several seasons of typical planting will help heal the land, says soil scientist DeAnn Presley of Kansas State University in Manhattan.

This compaction in turn causes the land above to crack, buckle and sink.

“We show the material can absorb a lot of energy because of this shock compaction mechanism of struts at the nanoscale, versus something that’s fully dense and monolithic, not nanoarchitected,” said Portela.

Part of the complexity is that we have GPS on our heavy equipment, and it helps us to determine the compaction levels.

From Time

Each is drawing toward the other, but like glass in the mid-state between fusion and compaction a single sand will splinter it.

But for vniformitie of building, orderlie compaction, Cambridge burned not long since.

A real moral defence against even intellectual error will be found in such a close compaction in mutual Christian love.

This compaction in love will lead to a wealth of certitude in the possession of the truth.


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