This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The act or process of falling in.

n. An incursion; an inroad.

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

n. 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

v. To fall in.

v. To undergo infall.

n. An incursion; an inroad.

n. A junction; a falling or running together, as of streams; the joining of one road with another.

n. The inlet or place where water enters a reservoir or basin: generally confined to cases where the water in entering pours or falls in.

"The infall is much smaller now, on the order of 5,500 tons per year and most in the form of micrometeorites or even smaller particles of interplanetary dust."

infalling   

penetrability    memorability    Nash    dislodgment    superquick