1. (noun)constriction, bottleneck, chokepoint a narrowing that reduces the flow through a channel Synonyms: constriction, bottleneck, chokepoint, tightness, coarctation
2. (verb)bottleneck the narrow part of a bottle near the top Synonyms: constriction, chokepoint
3. (verb)bottleneck slow down or impede by creating an obstruction
4. (verb)bottleneck become narrow, like a bottleneck