zlacker

There is one linked in the article. Stardict format; any reasonable dictionary software will read it.

>>interf+(OP)
That appears to be a 2007 copy of Websters? I'm looking for Chambers. Seems that there isn't an ebook of it, just phone apps.

Discovered that their 13th edition accidently left out ~500 words:

https://chambers.co.uk/wp-content/uploads/2016/09/Chambers-M...