Wikipedia is not a dictionary; therefore, what more can be said about corroborating evidence that makes it clear that this topic can be given more than just a dictionary definition? For example, can we add a discourse on the meaning (history, etc.) of "corroborating evidence" as an important piece of, e.g., legal jargon? --LMS
But, the organization of this topic (and others) lists a series of often obscure (to the lay reader) terms that require concise definitions to be useful. That does not make Wikipedia a dictionary because (eventually), for example, one could read a piece on "corroborating evidence" as part of a larger article on the history and use of evidence.