An idiom is a widely used saying or expression containing a figurative meaning that differs from the phrase's literal meaning.
raise one's sights
to set higher goals for oneself
Our team is doing very well and we are now raising our sights on the city championship.
List of common idioms, their meanings and examples of their usage in sentences
A group of words which have a different meaning when used together from the one they would have if you took the meaning of each word separately.