SkyfireDict

frontier   (TTS Sound)

The noun frontier has 3 senses

• frontier -- (a wilderness at the edge of a settled area of a country; "the individualism of the frontier in Andrew Jackson's day")


• frontier -- (an international boundary or the area (often fortified) immediately inside the boundary)


• frontier -- (an undeveloped field of study; a topic inviting research and development; "he worked at the frontier of brain science")