I just used for looking up words in an article. Afterwards I wanted to have another look on the words in the history. But it was not there. The history feature was not available. I checked several times, I did not find it.
I wrote an email to the developers. Afterwards I went back to the dictionary. The history feature was there then but as proof that it had not been there before only one word the most recent was listed in the history. I have in the ongoing instance of using the dictionary looked up more than 10 words. I did not close the dictionary for writing an email and I switched to and forth the dictionary app before many times.
I do not know.