>>cosmoj+(OP)
I was given a copy of Chambers Dictionary[0] by my sister for my 18th birthday, I still have it. According to wiki, it is "widely used by British crossword solvers and setters, and by Scrabble players[..] It contains many more dialectal, archaic, unconventional and eccentric words than its rivals, and is noted for its occasional wryly humorous definitions".
I've always loved its definition of "éclair":
> "a cake, long in shape but short in duration"
[0] https://en.wikipedia.org/wiki/Chambers_Dictionary