Device and Idiomatic expression

Device noun - A clever often underhanded means to achieve an end.

Idiomatic expression and device are semantically related. In some cases you can use "Idiomatic expression" instead a noun "Device".

Idiomatic expression noun - An expression whose meanings cannot be inferred from the meanings of the words that make it up.

Device and idiomatic expression are semantically related. Sometimes you can use "Device" instead a noun phrase "Idiomatic expression".