Obstruction (Noun)
Meaning 1
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".
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Nouns denoting cognitive processes and contents.
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Meaning 2
Any structure that makes progress difficult.
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Nouns denoting man-made objects.
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Meaning 3
The physical condition of blocking or filling a passage with an obstruction.
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Nouns denoting natural processes.
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Meaning 4
The act of obstructing; "obstruction of justice".
Classification
Nouns denoting acts or actions.