any structure that makes progress difficult

[ Syn: obstructor , obstructer , impediment , impedimenta ]

the physical condition of blocking or filling a passage with an obstruction

[ Syn: blockage ]

something immaterial that stands in the way and must be circumvented or surmounted; lack of imagination is an obstacle to ones 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 ]

the act of obstructing; obstruction of justice'

getting in someone's way