1. The act of blocking
   "The occlusion of the artery led to reduced blood flow";
   - blockage, closure
    
2. Closure or blockage (as of a blood vessel)
   "The patient's stroke was caused by an occlusion in a cerebral artery"
    
3. (dentistry) the normal spatial relation of the teeth when the jaws are closed
   "The dentist checked the patient's occlusion to ensure proper bite alignment"
    
4. (meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft
   "The occlusion resulted in complex weather patterns";
   - occluded front
    
5. Partial or complete obstruction of an object or part of an image by another object
   "The occlusion of the face by the hand made facial recognition challenging"

Derived forms: occlusions

Type of: attack, front, obstruction, position, spatial relation

Encyclopedia: Occlusion