pile up
verb
Forms piles up piling up piled up
- verb (transitive) To form a pile, stack, or heap. “The kids piled up their boots and coats by the back door.”
- verb (idiomatic, intransitive) To collect or accumulate, as a backlog. “The requests piled up while she was away.”
- verb (intransitive) To sustain a motor vehicle accident; to crash.
Synonyms
accumulate agglomerate amass build up cumulate heap heap up mound pile rack up stack stack up upheap head up conglomerate gather roll up collect compile hoard
Antonyms
Sources: Wiktionary · WordNet 3.0 — from the Wiktionary entry “pile up”, CC BY-SA 4.0. Details