blockage

(noun) the physical condition of blocking or filling a passage with an obstruction. Synonyms: obstruction.

(noun) an obstruction in a pipe or tube. Synonyms: block, closure, occlusion, stop, stoppage. Example: "We had to call a plumber to clear out the blockage in the drainpipe."

(noun) the act of blocking. Synonyms: closure, occlusion.