obstruction
noun uk/əbˈstrʌk.ʃən/ us/əbˈstrʌk.ʃən/
[ C or U ]阻塞物，障碍物
something that blocks a road, passage, entrance, etc. so that nothing can go along it, or the act of blocking something in this way
There's some kind of obstruction on the railway tracks. 铁轨上有障碍物。
[ U ]阻碍；阻止，阻挠；妨碍
behaviour or actions that prevent something from happening or working correctly
They were charged with obstruction of the police/of justice (= preventing the police/law courts from doing their jobs). 他们被指控妨碍警方执行公务／司法公正。
[ U ]（体育项目中的）阻挡犯规
in sport an occasion when one player gets in the way of another and so prevents them from moving freely
The referee said it was obstruction. 裁判判定这是阻挡犯规。