1. (

• occlusion

) closure or blockage (as of a blood vessel) ;

2. (

• occluded_front ,
• occlusion

) (meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft ;

3. (

• occlusion

) (dentistry) the normal spatial relation of the teeth when the jaws are closed ;

4. (

• blockage ,
• block ,
• closure ,
• occlusion ,
• stop ,
• stoppage

) an obstruction in a pipe or tube; "we had to call a plumber to clear out the blockage in the drainpipe" ;

5. (

• blockage ,
• closure ,
• occlusion

) the act of blocking ;