The Oxford Thesaurus An A-Z Dictionary of Synonyms - siege n.

1) blockade, encirclement, beleaguerment, besiegement: The siege of Troy lasted ten years. --v. 2) lay siege to, besiege, blockade, beleaguer, cordon off, encircle, box or pen or shut in, bottle up: They sieged the city and the inhabitants surrendered when they ran out of food and water.