Sentence examples for a frontier from inspiring English sources

The phrase "a frontier" is correct and can be used in written English.
It typically refers to a border or boundary between two regions, countries, or territories. It can also be used more abstractly to describe the limits or boundaries of an idea, belief, or field of study. For example: - "The town was located on a frontier, between the settled lands and the unknown wilderness." - "They crossed the sea and entered a new frontier, eager to explore and conquer." - "The internet has opened up a new frontier for communication and information exchange." - "The study of human consciousness is a frontier that scientists are still trying to understand." - "As an artist, I am always pushing the frontier of my creativity and breaking new boundaries."