obstruction
     n 1: any structure that makes progress difficult [syn: {obstructor},
           {obstructer}, {impediment}, {impedimenta}]
     2: the state or condition of being obstructed [syn: {blockage}]
     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" [syn: {obstacle}]
     4: the act of obstructing; "obstruction of justice"
     5: getting in someone's way
Source: WordNet® 2.0