Natural rights are those that are not dependent on the laws or customs of any particular culture or government, and so are universal, fundamental and inalienable (they cannot be repealed by human laws, though one can forfeit their enjoyment through one's actions, such as by violating someone else's rights).

Myself, I'm more with Jeremy Bentham and George Carlin in this:

Rights don't exist, there is no such thing as a natural or inalienable right. Rights are flimsy fantasies, they are nothing but societal agreements, contracts to treat with each other on a common set of core-values. Which makes it all the more important that we defend these rights and enforce those social contracts.

And with those rights come the duties to respect those of others, like the right of the litigant to not have their trial disrupted.

Edit: Marking the quote.