Definition of barrier
1a
: something material that blocks or is intended to block passage
highway barriers a barrier contraceptive
b
: a natural formation or structure that prevents or hinders movement or action
geographic barriers to species dissemination barrier beaches drugs that cross the placental barrier
2
barriers or Barriers plural
: a medieval war game in which combatants fight on foot with a fence or railing between them
3
: something immaterial that impedes or separates : obstacle
behavioral barriers trade barriers
Test Your Vocabulary
Eponyms: Words Named After People
-
- What is the best definition of boycott?

Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share barrier
Time Traveler for barrier
The first known use of barrier was in the 14th century
See more words from the same century