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backup
This term conveys a sense of security and redundancy, acting as a safety net against failure or loss. Whether referring to a person, a digital file, or tactical support, the word implies a secondary layer of protection that ensures continuity when the primary system or individual is compromised.
In the context of traffic or queues, the word shifts from a positive safety measure to a negative obstruction. Here, it describes a physical accumulation where flow has ceased, creating a stagnant line that extends backward from a point of blockage.
Meanings
A person or thing that can be used as a substitute if the primary one fails or is unavailable.
The team has a reliable backup goalkeeper in case of injury.
Support or assistance provided to someone, especially in a dangerous situation.
The police officer called for backup when the situation escalated.