@maswan
The biggest difference is `word-lookup` uses definitions from Wiktionary, and it being a node package might make it easier to install on Windows. Self-hosting the freeDictionaryAPI server it uses is probably possible with some work.
`dictd`, the server for `dict`, is trivial to self-host, and it has more dictionaries, like GCIDE, WordNet, FOLDOC, and the Jargon File (I didn't see Wiktionary as an option, though).
@aral