|1.||[ noun ] a structure or object that impedes free movement|
|Related terms:||obstruction fence railing bannister grate breakwater roadblock dam barricade hurdle revetment fender starting_gate movable_barrier crash_barrier bulwarks|
|2.||[ noun ] any condition that makes it difficult to make progress or to achieve an objective|
"intolerance is a barrier to understanding"
|Related terms:||obstacle language_barrier ideological_barrier|
|3.||[ noun ] anything serving to maintain separation by obstructing vision or access|
|Related terms:||mechanism curtain blood-brain_barrier bar|
|4.||[ noun ] Last name, frequency rank in the U.S. is 6936|