English idiomsAn idiom is a phrase whose meaning cannot be determined by the literal definition of the phrase itself, but refers instead to a figurative meaning that is known only through common use
In linguistics, idioms are widely assumed to be figures of speech that contradict the principle of compositionality; however, this has shown to be a subject of debate
John Saeed defines an idiom as words collocated together happen to become fossilized, becoming fixed over time
This collocation -- words commonly used in a group -- changes the definition of each of the words that exist
As an expression, the word-group becomes a team, so to speak
That is, the collocated words develop a specialized meaning as a whole and an idiom is born
An idiom is a word or phrase that means something differ