from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The act or an instance of happening; occurrence: did not expect criticism and was surprised by its incidence.
- n. Extent or frequency of occurrence: a high incidence of malaria in the tropics.
- n. Physics The arrival of radiation or a projectile at a surface.
- n. Physics Angle of incidence.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The act of something happening; occurrence
- n. The extent, or the relative frequency of something happening
- n. The striking of radiation or a projectile upon a surface
- n. A measure of the risk that a person develops a new condition within a specified period of time, usually a year.
from the GNU version of the Collaborative International Dictionary of English
- n. A falling on or upon; an incident; an event; an occurrence.
- n. The direction in which a body, or a ray of light or heat, falls on any surface.
- n. The rate or ratio at which something occurs.
from The Century Dictionary and Cyclopedia
- n. A subordinate occurrence or thing; an incident; something incidental or casual.
- n. The manner of falling; direction of the line of fall; course.
- n. In physics, the falling or impinging of a ray of light or heat, etc., upon a surface: used especially with reference to the direction of the ray.
- n. In astronomy, same as immersion, 4.
- n. In geometry, the situation of two figures in which they have something more in common than they would have in some other situation, but do not completely coincide.
- n. In gunnery, the angle which the longer axis of a projectile makes with the surface struck.
- n. The actual fall of taxation upon a particular individual or piece of property, in distinction from its nominal or supposed distribution.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the striking of a light beam on a surface
- n. the relative frequency of occurrence of something
From Medieval Latin incidentia ("a falling upon"), from Latin incidens, present participle of incidere ("to fall upon"), from in ("on") + cadere ("to fall"). (Wiktionary)