roadblock noun
ADJ. army, police
VERB + ROADBLOCK erect, set up Police have set up a roadblock on the road to London. | remove
PREP. at a/the ~ They were stopped at a roadblock leaving the city. | through a/the ~ The truck drove through the roadblock at 100 mph.
You can also check other dicts: roadblock (English, 中文解释 ), wordnet sense, Collins Definition