- a route by which goods are transported to those using or purchasing them, especially one carrying food and equipment for troops during a war: They thrust deeply into enemy territory, attacking enemy headquarters, communications, and supply lines.The trucker blockade shut off a major supply line from Canada to the United States.
- a tube, pipe, or cable that carries water, fuel, electricity, etc., to the place where it is needed or used: Locate the water supply line coming into the valve and turn it off at the source, typically under the sink.Crews are working to get the pipeline back in service, as it is a major supply line to several southern states.
- supply chain.
