1. [ noun ] something immaterial that stands in the way and must be circumvented or surmounted
Synonyms: obstruction

: "the poverty of a district is an obstacle to good education" "the filibuster was a major obstruction to the success of their plan"

Related terms: hindrance barrier hurdle stymie hang-up
2. [ noun ] an obstruction that stands in the way (and must be removed or surmounted or circumvented)
Related terms: obstruction stumbling_block water_jump hazard
Similar spelling:   obstinacy