Occlude means to obstruct, as with an opening. You hear this a lot in a medical context. Heart surgeons are looking for occlusions in blood vessels––things that occlude the flow of blood.

Occlude does not exist only in a medical context. If you close the bathroom door so your little brother won't come in while you're trying out makeup with your friends, you're occluding the bathroom. Meanwhile, your makeup occludes your pores.

Definitions of occlude

v block passage through

block, close up, impede, jam, obstruct, obturate
disengage, free
free or remove obstruction from
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block off, blockade
obstruct access to
barricade, barricado
block off with barricades
prevent access to by barricading
asphyxiate, choke, stifle, suffocate
impair the respiration of or obstruct the air passage of
tie up
restrain from moving or operating normally
dam, dam up
obstruct with, or as if with, a dam
block out, screen
prevent from entering
earth up, land up
block with earth, as after a landslide
bar, barricade, block, block off, block up, blockade, stop
render unsuitable for passage
back up, choke, choke off, clog, clog up, congest, foul
become or cause to become obstructed
gum up
stick together as if with gum
block off, close off, shut off
block off the passage through
protect from light, heat, or view
bar access to
crap up
become obstructed or chocked up
block, choke up, lug, stuff
silt, silt up
become chocked with silt
Type of:
hinder, impede
be a hindrance or obstacle to

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