- (an) accumulation, a pile;〔地質学で〕sedimentation
堆積する pile [build] up; accumulate
- 道路の泥の堆積をかたづけた
- They cleared the streets of the (heaps of) mud./They removed the mud which had accumulated on the roads.
- 膨大な資料が堆積していた
- A huge amount of data had accumulated [piled up]./《口》 There were heaps of materials.
- 堆積岩a sedimentary rock
- 堆積物sediment; a deposit