difference between Idiom and Idiomatic expression

[Jose Gregorio]

...really want to know the difference between an idiom and an idimatic expression...

[blouen]

Idiom is spelled with only 5 letters I guess, while idiomatic expression is a whole lot longer.

This is what I know. And based on my dictionary, they're just the same.

[Tdol]

Phrasal verbs, for instance, are regarded as idiomatic because the meaning cannot be worked out from the definitions of the individual words, but are rarely called full idioms.

[bianca]

...really want to know the difference between an idiom and an idimatic expression...

I suppose, an idiomatic expression (a phrasal idiom) resembles or has the nature of an idiom. An idiom - as distinguished from an idiomatic expression - also has the meaning of artistic style, like the style of a particular artist or school or movement (the classical, rococo, baroque style and so on).

idiom - definition of idiom by the Free Online Dictionary, Thesaurus and Encyclopedia.