1. the act of blocking
2. an obstruction in a pipe or tube
e.g. we had to call a plumber to clear out the blockage in the drainpipe
Synonym: blockageblockclosurestopstoppage
3. (dentistry) the normal spatial relation of the teeth when the jaws are closed
4. (meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft
Synonym: occluded front
5. closure or blockage (as of a blood vessel)