[noun] (meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft Synonyms: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" Synonyms:blockage, block, closure, stop, stoppage
