OCCLUSION

Definition

1. noun closure or blockage (as of a blood vessel).
2. noun (meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft. — synonyms: occluded_front
3. noun (dentistry) the normal spatial relation of the teeth when the jaws are closed.
4. noun an obstruction in a pipe or tube. — synonyms: blockage, block, closure, stop, stoppage
5. noun the act of blocking. — synonyms: blockage, closure