Definitions
1.nounThe act of something happening; occurrence.
2.nounThe extent or the relative frequency of something happening.
3.nounThe manner of falling; bearing or onus, as of a tax that falls unequally.
4.nounThe striking of radiation or a projectile upon a surface.
5.nounA measure of the rate of new occurrence of a given medical condition in a population within a specified period of time.
6.nounThe falling of a point on a line, or a line on a plane.