The good thing with Wikipedia (the English version in particular) is that both sides try to manipulate it, in addition to those who really want to say the truth, so in the end, it is relatively neutral. And if you want to go further, there are citations, which is maybe the most important aspect of Wikipedia compared to traditional media, including encyclopedias.
Wikipedia is not perfect, but it does its best to resist manipulation: citations, all activity is recorded and publicly available, etc...
Non-English Wikipedias have more bias, because they are smaller and also because unlike the English version that is used worldwide, even by non-English speakers, the non-English ones are often tied to specific countries. For example, I think I remember seeing the Arabic Wikipedia as being explicitly pro-Palestine, I guess the opposite is true for the Hebrew version.
For example, Wikipedia's definition of Zionism was updated to include "as much land, as many Jews, and as few Palestinian Arabs as possible". There are absolutely no other dictionaries or encyclopedias with definitions resembling that; Wikipedia is uniquely biased there.
https://en.wikipedia.org/w/index.php?oldid=1276887484#Langua...
When you can't eliminate bias completely, as I think it is the case here, the next best thing is transparency, and you can hardly get better than that! Maybe no other dictionaries or encyclopedias describe it like that, but no other dictionaries or encyclopedias give so much detail on why it is described the way they do.
In the end "Zionism" is just a word, the meaning of it is what people make it to be, not what dictionaries or encyclopedias say it is, and considering the current situation, it means different things if you ask different people, so bias is unavoidable. Of course, if it is etymology you are after, the Wikipedia article covers that too, with plenty of citations.
