Definition of Frontier
an area that has not been fully explored
Examples of Frontier in a sentence
The science fiction program begins with a description of space as the final frontier. 🔊
Because the scientists are working on genetic cloning, they are at the frontier of reproductive science. 🔊
The president hired explorers to travel across the country and map the uncharted frontier. 🔊
When the astronaut put his foot down, he was the first human to step into the frontier known as Mars. 🔊
As the hikers moved through the tropical forest, they hoped the area would remain an undeveloped frontier. 🔊
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