Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

frontier

play
noun fron·tier \ˌfrən-ˈtir, ˈfrən-ˌ, frän-ˈ, ˈfrän-ˌ\

Simple Definition of frontier

  • : a border between two countries

  • : a distant area where few people live

  • : the limits of knowledge in a particular field

Source: Merriam-Webster's Learner's Dictionary

Full Definition of frontier

  1. 1 a :  a border between two countries b obsolete :  a stronghold on a frontier

  2. 2 a :  a region that forms the margin of settled or developed territory b :  the farthermost limits of knowledge or achievement in a particular subject c :  a line of division between different or opposed things <the frontiers separating science and the humanities — R. W. Clark> d :  a new field for exploitative or developmental activity

frontier

adjective

Examples of frontier in a sentence

  1. the frontier between Canada and the U.S.

  2. They were sent on an expedition to explore the western frontier.



Origin and Etymology of frontier

Middle English fronter, from Anglo-French frountere, fronter, from front


First Known Use: 15th century


FRONTIER Defined for Kids

1

frontier

play
noun fron·tier \ˌfrən-ˈtir\

Definition of frontier for Students

  1. 1 :  a border between two countries

  2. 2 :  the edge of the settled part of a country




2

frontier

play
adjective fron·tier

Definition of frontier for Students

  1. :  of, living in, or situated in the frontier <frontier towns> <frontier families>





Seen and Heard

What made you want to look up frontier? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a jerking and twitching of the body

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

two-chairs-on-a-pier-by-the-ocean-in-summer

Which of the following words means “of or relating to summer”?

vernal brumal estival hiemal
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ