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.. Synonyms: roadblock.

(noun) a barrier (usually thrown up hastily) to impede the advance of an enemy. Example: "They stormed the barricade."

(verb) render unsuitable for passage. Synonyms: block, blockade, stop, block off, block up, bar. Examples: "Block the way." "Barricade the streets." "Stop the busy road."

(verb) prevent access to by barricading. Example: "The street where the president lives is always barricaded."

(verb) block off with barricades. Synonyms: barricado.