[Idiom] run away with the/an idea

[Snappy]

Are the following sentences OK?
What is the difference in nuance between them?

"Don't run away with the idea that this job is easy."
"Don't run away with an idea that this job is easy."
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[Skrej]

They are both grammatical, but they may not carry your intended meaning, depending upon what you mean by 'run away with'.

What do you mean by 'run away with' in your sentence? It has a literal meaning, as well as several idiomatic meanings.

 

[Snappy]

They are both grammatical, but they may not carry your intended meaning, depending upon what you mean by 'run away with'.

What do you mean by 'run away with' in your sentence? It has a literal meaning, as well as several idiomatic meanings.

I used the expression to mean "Don't jump to the conclusion that this job is easy."

 

[MikeNewYork]

I would use "the" in your sentence.