garbage collection

/G AA1 R B IH0 JH K AH0 L EH1 K SH AH0 N/
noun
  1. 1

    A service, generally run by local government, for transporting household garbage to the appropriate facility.

  2. 2

    An automatic mechanism that frees up resources (such as allocated memory) that are no longer in use.

    โ€œGarbage collection isnโ€™t foolproof, but it eliminates large classes of memory errors.โ€

Source: https://en.wiktionary.org/wiki/garbage%20collection