1.Definition: an obstruction that stands in the way (and must be removed or surmounted or circumvented)

Category: Objects

2.Definition: 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 success of their plan"

Related Noun(s):obstruction

Category: General