›NATURAL RESOURCESa very long large tube, usually underground, used to transport oil, gas, etc. over a long distance: The Alaska pipeline crosses the wilderness in the northern Yukon.pipeline company/operatorThe gas pipeline operator warned of possible shortages this winter.pipeline network/systempipeline construction/maintenance/operationsRecently we have made progress towards improving pipeline maintenance.
in the pipeline›a plan, product, etc. that is in the pipeline is being discussed or prepared and will be produced or finished in the future: The CEO told the media there were no further acquisitions in the pipeline.