#1 obstruction n. [obstructor, obstructer, impediment, impedimenta] any structure that makes progress difficult. wn
#2 obstruction n. [blockage] the physical condition of blocking or filling a passage with an obstruction. wn
#3 obstruction n. [obstacle] something immaterial that stands in the way and must be circumvented or surmounted; "lack of imagination 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 suc. wn
#4 obstruction n. the act of obstructing; "obstruction of justice". wn
#5 obstruction n. getting in someone's way. wn
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