a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc.
a barrier (usually thrown up hastily) to impede the advance of an enemy; "they stormed the barricade"
render unsuitable for passage; "block the way"; "barricade the streets"; "stop the busy road"
prevent access to by barricading; "The street where the President lives is always barricaded"
block off with barricades