infall

/IH0 N F AO0 L/
noun
  1. 1

    The act or process of falling in.

  2. 2

    An incursion; an inroad.

  3. 3

    The area where water, storm runoff, etc., enters a storm drain.

  4. 4

    Movement towards a massive astronomical body under the influence of gravity; especially the process whereby gas falls towards a neutron star or black hole at high speed, forming a plasma

verb
  1. 1

    To fall in.

  2. 2

    To undergo infall.

Source: https://en.wiktionary.org/wiki/infall