Definition of barrier
1 a : 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 plural often capitalized : 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>
Examples of barrier in a sentence
Concrete barriers surround the race track to protect spectators.
The tree's roots serve as a barrier against soil erosion.
The mountain range forms a natural barrier between the two countries.
Both leaders are in favor of removing trade barriers.
Cultural barriers have made it hard for women to enter many professions.
He argues that regulations should not be viewed as barriers to progress.
Origin and Etymology of barrier
Middle English barrere, from Anglo-French, from barre bar
First Known Use: 14th century
BARRIER Defined for English Language Learners
Definition of barrier for English Language Learners
: something (such as a fence or natural obstacle) that prevents or blocks movement from one place to another
: a law, rule, problem, etc., that makes something difficult or impossible
: something that makes it difficult for people to understand each other
BARRIER Defined for Kids
Definition of barrier for Students
1 : something (as a fence) that blocks the way
2 : something that keeps apart or makes progress difficult <a language barrier>
Medical Definition of barrier
1a: a material object or set of objects that separates, demarcates, or serves as a barricade—see blood-brain barrier, placental barrierb: a contraceptive device (such as a condom or cervical cap) that prevents sperm from entering the uterus—often used before another noun <barrier contraception>
2: a factor that tends to restrict the free movement, mingling, or interbreeding of individuals or populations <behavioral and geographic barriers to hybridization>
Seen and Heard
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