|burden of proof|
|law the obligation, in criminal cases resting initially on the prosecution, to provide evidence that will convince the court or jury of the truth of one's contention|
burden of proof
Obligation of proving a disputed charge or allegation. For example, Are you sure you mailed the tax return on time? The burden of proof's on you. A legal term dating from the late 1500s, it has also been used more loosely in recent times.