Толковый словарь английского языка Oxford English Reference - obstruction

n. 1 the act or an instance of blocking; the state of being blocked. 2 the act of making or the state of becoming more or less impassable. 3 an obstacle or blockage. 4 the retarding of progress by deliberate delays, esp. of Parliamentary business. 5 Sport the act of unlawfully obstructing another player. 6 Med. a blockage in a bodily passage, esp. in an intestine. Derivatives obstructionism n. (in sense 4). obstructionist n. (in sense 4). Etymology: L obstructio (as OBSTRUCT)