obstructionist /əbˈstɹʌk.ʃənˌɪst/adjective 2noun 2forms 3 adjective2 •Pertaining to obstructionism. •Obstructionistic. noun2 •Someone who systematically obstructs the actions of others."And you, sir, have lived an unimaginative obstructionist and never can hope now to emerge from it." — 1913 •Someone who attempts to impede the progress of legislation. formsobstructionists · more obstructionist · most obstructionist