occlusion
noun.
closure or blockage (as of a blood vessel)
noun.
(meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft
Synonym: occluded front
noun.
(dentistry) the normal spatial relation of the teeth when the jaws are closed
noun.
an obstruction in a pipe or tube
we had to call a plumber to clear out the blockage in the drainpipe
Synonym: block, blockage, closure, stop, stoppage
noun.
the act of blocking
Synonym: blockage, closure