Definitions

1. noun

an obstacle or hindrance that prevents or slows something from happening or being done

“The construction of a new highway was delayed by a series of environmental barriers.”

2. verb

to prevent or hinder something from happening or being done

“The government is trying to barrier the flow of immigrants into the country.”

3. noun

a device or structure that prevents or controls the movement of people or things

“The airport has a security barrier that scanners and metal detectors.”

4. noun

a physical or metaphorical obstacle that must be overcome

“The fear of failure was a huge barrier to her success.”