Longman Dictionary of Contemporary English homepage

bottleneck

 noun
     
Related topics: Roads
bot‧tle‧neck [countable]
1TTR a place in a road where the traffic cannot pass easily, so that there are a lot of delays
2 a delay in one stage of a process that makes the whole process take longer:
Understaffing has caused a real bottleneck.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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