massing

/M AE1 S IH0 NG/
verb
  1. 1

    To form or collect into a mass; to form into a collective body; to bring together into masses; to assemble.

  2. 2

    To have a certain mass.

    โ€œI mass 70 kilograms.โ€

verb
  1. 1

    To celebrate mass.

noun
  1. 1

    A bringing together into a mass.

Source: https://en.wiktionary.org/wiki/mass, https://en.wiktionary.org/wiki/massing