pile up meaning and definition

PILE UP verb

Definition of pile up (verb)

1. collect or gather
   • "Journals are accumulating in my office"; "The work keeps piling up"
   • synonyms: accumulate, amass, conglomerate, cumulate, gather
2. arrange into piles or stacks
   • "She piled up her books in my living room"
   • synonyms: heap up, stack up
3. get or gather together
   • "I am accumulating evidence for the man's unfaithfulness to his wife"; "She is amassing a lot of data for her thesis"; "She rolled up a small fortune"
   • synonyms: accumulate, amass, collect, compile, hoard, roll up