Is there a reverse-searchable dictionary? [closed]

Question

I use Merriam-Webster and Wiktionary. I'm looking for a way to search within definitions and do other searches on either of those sites or a site where these kinds of searches can be performed.

• search for all words that contain a word or phrase in their definition
• search for all words that match a pattern: eg. un*ly or *just*
• not essential: search on parts of speech or etymology
• Boolean combinations

I once had some desktop software that would do this. I know the patterns can be searched in scrabble dictionaries, but they don't often have full-text definitions.

Answer 1

Yes, it is called OneLook.

Answer 2

For searching by pattern, I use the Regex Dictionary, it's very useful. You can't search in their definition though, but it does your second point really well.