What is the meaning of obstruction?

noun

• Any structure that makes progress difficult.
  • synonyms: obstructor, obstructer, impediment, impedimenta
• The physical condition of blocking or filling a passage with an obstruction.
  • synonyms: blockage
• Something immaterial that stands in the way and must be circumvented or surmounted.
  • usage: "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"
  • synonyms: obstacle
• The act of obstructing.
  • usage: "obstruction of justice"
• Getting in someone's way. .