Full fledged dictionary for Prolog?

I know that there are WordNet implementations for Prolog and that many people use the word glosses in WordNet for dictionary-style application purposes, but I was wondering if there is a full-fledged dictionary in Prolog format like Webster’s, etc.?

Side question. Did anybody here ever manage to do something useful with OpenCyc? If not, are there any Prolog compatible RDF databases you found interesting or useful?

https://www.cyc.com/opencyc/