Search Dictionary
Definition of frontier

frontier

/frʌnˈtɪr/
fron · tier

Plural:frontiers
JUMP TO:

frontier Lexical Profile

frontier Game Scores & Validity

• noun

1

A line or border separating two countries.

Example

"Travelers had to present their passports to customs officials at the mountain frontier."


2

North American The extreme limit of settled land beyond which lies wilderness, especially in the historical westward expansion of the United States.

Example

"Nineteenth-century pioneers built log cabins as they pushed the frontier further west."


3

The outer limit of knowledge, achievement, or exploration in a particular field.

Example

"Deep-sea exploration remains an exciting scientific frontier with thousands of undiscovered species."

Synonyms
View all synonyms for frontier
Antonyms
View all antonyms for frontier

• adjective

1

Relating to or situated on a border or the outer edge of settled territory.

Example

"Life in the small frontier town required resilience and close cooperation among neighbors."


2

Relating to the most advanced, innovative, or newly developing area of research or activity.

Example

"The institute secures funding for frontier research in quantum computing and renewable energy."

Synonyms
View all synonyms for frontier
Antonyms
View all antonyms for frontier

Word Nuance & Usage

In British English, 'frontier' typically refers to an international border between two sovereign countries, whereas in American English it primarily denotes the remote edge of settled territory facing the wilderness.

• Rhymes for frontier

Word Origin & Etymology

Borrowed in the 15th century from Old French 'frontiere', meaning a borderland or military front line, derived from Latin 'frons' (forehead or front).

Cite this Entry


Wordmom. (2026). Definition of Frontier. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/frontier
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Dictionary & Reference
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.