obstruction

(əb-strŭkˈshən, ŏb-)

1. One that obstructs; an obstacle. See Synonyms at obstacle.
2. a. The act or an instance of obstructing.
   b. The condition of being obstructed.
3. The act of causing a delay or an attempt to cause a delay in the conduct of business, especially in a legislative body.
4. Sports The act of impeding another player in a match or race.