Definition of "Barricade" :

noun: a barrier (usually thrown up hastily) to impede the advance of an enemy

"They stormed the barricade."

noun: a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc.

verb: block off with barricades

verb: prevent access to by barricading

"The street where the President lives is always barricaded."

verb: render unsuitable for passage

"Barricade the streets."