one that methodically blocks or interrupts an activity, specifically one who attempts to hinder passing of legislation by way of delaying tactics, eg a filibuster.
an individual who methodically obstructs what of other individuals
a person who tries to impede the development of legislation
one that deliberately hinders progress; a person who obstructs business, as in a legislative body.
a person who factiously opposes and hinders the action of other people; especially, one who methodically, persistently, and factiously hinders the deal of business in a legislative installation; an obstructive; a filibuster.
an individual who systematically obstructs some activity that other people wish to simply take