occlusion

noun

1. (countable, uncountable)The process of occluding, or something that occludes.
2. (countable, uncountable)Anything that obstructs or closes a vessel or canal.
3. (countable, uncountable)The alignment of the teeth when upper and lower jaws are brought together.
4. (countable, uncountable)An occluded front.
5. (countable, uncountable)A closure within the vocal tract that produces an oral stop or nasal stop.
6. (countable, uncountable)The absorption of a gas or liquid by a substance such as a metal.
7. (countable, uncountable)The blocking of the view of part of an image by another.