difference betwen idioms and proverbs

[unregistered]

What is the difference between `idioms' and `proverbs'?

[Anglika]

Idiom = a group of words whose meaning cannot be deduced from those of the individual words (e.g. over the moon)

proverb = a short saying stating a general truth or piece of advice.

[user_gary]

I think it is good question.

Is there any thread dealing with difference between (phrase, idioms, proverbs)?

Because, I also has this doubt for many years.