obstruction

n. that which obstructs; obstacle; interference; hindrance, impediment; blockade

Obstruction is the act of blocking or impeding some passage:Obstruction theory, in mathematics, a name for any of several theoriesObstruction of justice, the crime of interfering with law enforcementObstructing government administrationPropagation path obstruction, in telecommunicationsSingle Vegetative Obstruction Model
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Obstruction /ob·struc·tion/ 1. the act of blocking or clogging. 2. block ; occlusion ; the state or condition of being clogged. [more]Obstruction - Community and Resources

Noun
1. any structure that makes progress difficult
(synonym) obstructor, obstructer, impediment, impedimenta
(hypernym) structure, construction
(hyponym) bar
2. the state or condition of being obstructed
(synonym) blockage
(hypernym) physiological state, physiological condition
(hyponym) intestinal obstruction, ileus
3. something immaterial that stands in the way and must be circumvented or surmounted; "lack of immagination is an obstacle to one's advancement"; "the poverty of a district is an obstacle to good education"; "the filibuster was a major obstruction to the success of their plan"
(synonym) obstacle
(hypernym) hindrance, deterrent, impediment, balk, baulk, check, handicap
(hyponym) barrier, roadblock
4. the act of obstructing; "obstruction of justice"
(hypernym) hindrance, interference
(hyponym) blockage, closure, occlusion
(derivation) obstruct, blockade, block, hinder, stymie, stymy, embarrass
5. getting in someone's way
(hypernym) maneuver, manoeuvre, play
(hyponym) blocking, block, interference

n. obstruction, blockage