Of course not, because that would be annoying and unwieldy. On the other hand, you can add expansive dictionaries for every language to an ereader for the low, low weight of... nothing at all.

I suspect if you compare the usage of dictionaries among paper book readers vs ereader users, the latter use them more often - probably at least partially because they're so much easier to use. I suspect the incidence of not understanding a word would be pretty much the same.

For myself, I read a lot of older books with archaic and niche terms, so it's practically required to be able to look things up if I want to really understand what's going on.

(As an aside, I looked up a definition on Google just writing this to ensure I was using a word properly. :P)

I get that. I also read many old books. Usually I can get context out of the sentence itself, but i'll occasionally bust out my phone. I see why it's nice, I just don't see why it's a top-tier feature.

Each their own of course. I can imagine if I was looking up 2-10x as many words as I am now then the convenience would indeed be much more important.

It's incredibly useful for obvious reasons

I'd suppose it depends on things like your vocabulary level, if the content you're reading is your first language, if you're reading more niche things, etc.

I'm not a native English speaker, but I read a lot of books in their original English. Being able to quickly look up a word you've never encountered is a god send

I find myself really missing this feature when I occasionally read a paper book, thinking about clicking the word on the page to get a definition.

That's how I got hooked on macos nearly 20 years ago. Dictionary + thesaurus taught me so much.

Yeah, I didn't think of non-native speakers. I def see the value there.

When reading on my iPad or Kindle (back when I had one of those), I would regularly encounter a word used in a context slightly different from my understanding of the word - so I'd quickly skim the definition to fill in the gap in my knowledge that this made apparent.

I _do_ miss that functionality on the reMarkable devices. It seems odd to me that it's not included; a dictionary isn't a huge file, and the devices have more than ample storage for their intended purpose. I used my daily for a couple of years, and I don't think I've ever deleted anything from them.