1. Noun.  The act or process of falling in.
  2. Noun.  An incursion; an inroad.
  3. Noun.  (countable) The area where water, storm runoff, etc., enters a stormdrain.
  4. Noun.  (context, astronomy) 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.
  5. Verb.  (intransitive) To fall in.
  6. Verb.  (intransitive, astronomy) To undergo infall.

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This entry was last updated on RefTopia from its source on 3/20/2012.