stop, halt, block, kibosh -- (stop from happening or developing; "Block his election"; "Halt the process")
jam, block -- (interfere with or prevent the reception of signals; "Jam the Voice of America"; "block the signals emitted by this station")
block -- (run on a block system; "block trains")
block -- (interrupt the normal function of by means of anesthesia; "block a nerve"; "block a muscle")
obstruct, block -- (shut out from view or get in the way so as to hide from sight; "The thick curtain blocked the action on the stage"; "The trees obstruct my view of the mountains")
block -- (stamp or emboss a title or design on a book with a block; "block the book cover")
stuff, lug, choke up, block -- (obstruct; "My nose is all stuffed"; "Her arteries are blocked")