Definitions
1.NounThe act or process of falling in.
2.NounAn incursion; an inroad.
3.NounThe area where water, storm runoff, etc., enters a storm drain.
4.NounMovement 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.VerbTo fall in.
6.VerbTo undergo infall.