#1 bottleneck n. [constriction, chokepoint] a narrowing that reduces the flow through a channel. wn
#2 bottleneck v. slow down or impede by creating an obstruction; "His laziness has bottlenecked our efforts to reform the system". wn
#3 bottleneck n. the narrow part of a bottle near the top. wn
#4 bottleneck v. become narrow, like a bottleneck; "Right by the bridge, the road bottlenecks". wn
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