1. [ noun ] (medicine) closure or blockage (as of a blood vessel)
Related terms: attack thrombosis coronary_occlusion thromboembolism laryngospasm embolism
2. [ noun ] an obstruction in a pipe or tube
Synonyms: block closure stop stoppage blockage

"we had to call a plumber to clear out the blockage in the drainpipe"

Related terms: obstruction plug breechblock vapor_lock stuff
3. [ noun ] (meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft
Synonyms: occluded_front
Related terms: front meteorology
4. [ noun ] (dentistry) the normal spatial relation of the teeth when the jaws are closed
Related terms: position dentistry
5. [ noun ] the act of blocking
Synonyms: closure blockage
Related terms: obstruction implosion close stop barricade obstruct obstruct parry
Similar spelling:   oculus