An idiom is a group of words, or in other words, a phrase that has a meaning different from the literal meaning of the words in it.
make way for (someone or something)
to stand aside, to move so that someone or something can pass by
The truck moved to the side of the road to make way for the ambulance.
List of common idioms, their meanings and examples of their usage in sentences
Idioms are phrases which cannot be understood simply by looking at the meaning of the individual words in the phrase.