obstructionism Syllabification: (ob·struc·tion·ism)Pronunciation: /əbˈstrəkSHəˌnizəm, äb-/Definition of obstructionism noun the practice of deliberately impeding or delaying the course of legal, legislative, or other procedures. Derivatives obstructionist noun & adjective obstructionism in other Oxford dictionaries Definition of obstructionism in the British & World English dictionary