The word "occlusion" refers to the closing or blocking of something, usually in relation to the teeth or blood vessels. It means when something gets in the way or prevents proper functioning or passage. Full definition
This kind of occlusion of a carotid artery, which can be the result of things ranging from blunt trauma to heavy exertion, appears to be the prime source of strokes in youngish middle - aged people — i.e. people like me. (dotearth.blogs.nytimes.com)
Strength coaches have experimented with occlusion training with other protocols too. (onnit.com)
With superior image quality and an extra performance cost of less than 1 frame per second, HBAO + is the clear choice for Ambient Occlusion in Dying Light. (geforce.com)