1. a heap or pile of rubbish, refuse, or the like.
  2. oblivion; obscurity; disregard; disuse: He was consigned to the dustheap after many years of public service.

Origin of dustheap

First recorded in 1645–55; dust + heap
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples of dustheap