Bottleneck literally refers to the top narrow part of a bottle. Figuratively, it may also refer:

• Bottleneck (engineering)
• Bottleneck (logistics)
• Bottleneck (traffic)
• Bottleneck guitar, also known as slide guitar
• Free State Bottleneck, a quasi-state that existed in Germany during the time of the Weimar Republic
• Population bottleneck, an evolutionary event that drastically reduces a population
• Von Neumann bottleneck, a limit of throughput between a computer's processor and its memory
• Choke point, a concept in military strategy and geopolitics
• Bottleneck (K2), mountaineering feature near the top of K2 mountain.

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