Definition of "occlusion"

The process of occluding, or something that occludes.  examples

(medicine) Anything that obstructs or closes a vessel or canal.  examples

(medicine, dentistry) The alignment of the teeth when upper and lower jaws are brought together.  examples

(meteorology) An occluded front.

(phonetics) A closure within the vocal tract that produces an oral stop or nasal stop.  examples

(physics) The absorption of a gas or liquid by a substance such as a metal.  examples

(computing) The blocking of the view of part of an image by another.  examples