The definition of a barrier is anything, either natural or manmade, that keeps something from passing through.
A heavy, traditionally wooden-soled shoe.
(Medicine) Overfullness of the capillary and other blood vessels, etc., in any locality or organ (often producing other morbid symptoms); local hypermic, active or passive; as, arterial congestion; venous congestion; congestion of the lungs.
A crush or congestion of people or things in a limited space:
A point at which traffic or other movement can easily become blocked.
Find another word for bottleneck. In this page you can discover 9 synonyms, antonyms, idiomatic expressions, and related words for bottleneck, like: logjam, barrier, clog, congestion, gridlock, impasse, jam, constriction and chokepoint.