In my usage, Collins dictionary is the best for explaining and giving background to English words. Wiktionary can't compete with that. I use it with an ad block

In my usage, Collins dictionary is the best for explaining and giving background to English words. Wiktionary can't compete with that. I use it with an ad blocker and read all their articles for a given word. IME their articles are written with learners in mind, too. I would probably count as a proficient English user that is still learning new words (well, who does not). Arbitrary word for example: https://www.collinsdictionary.com/dictionary/english/gremlin https://www.collinsdictionary.com/dictionary/english/gremlin