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OBSTRUCT', verb transitive [Latin obstruo; ob and struo, to set.]

1. To block up; to stop up or close; as a way or passage; to fill with obstacles or impediments that prevent passing; as, to obstruct a road, highway or channel; to obstruct the canals or fine vessels of the body.

2. To stop; to impede; to hinder in passing; as, the bar at the mouth of the river obstructs the entrance of ships; clouds obstruct the light of the sun.

3. To retard; to interrupt; to render slow. Progress is often obstructed by difficulties, though not entirely stopped.