definition of obstruction
obstruction in British English. See all translations. obstructionnoun. uk â /ÉbËstrÊk.ÊÉn/ us â /ÉbËstrÊk.ÊÉn/. âº [ C or U ] 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.