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