Deadlock n. : A lock which is not self-latching, but requires a key to throw the bolt forward.

Deadlock n. : A counteraction of things, which produces an entire stoppage; a complete obstruction of action.

Example:
How can we break the Deadlock over whether Puerto Rico becomes a state, or not?

Taxonomy
deadlock, processes, algorithms, Livelock, lock, Deadlock Detection, deadlock avoidance, ruler, Circular wait, waits, deadlock prevention, pencil, client application, resource allocation, formatter, unsafe state, preemption, deadlock detection algorithm.

Defination from the web:
Deadlock (disambiguation). A deadlock is a situation wherein two or more competing actions are ... Deadlock is a common problem in multiprocessing where many processes share a specific type of mutually exclusive resource known as a software lock or soft lock. ...