|1.||a long pipe, esp underground, used to transport oil, natural gas, etc, over long distances|
|2.||a medium of communication, esp a private one|
|3.||in the pipeline in the process of being completed, delivered, or produced|
|4.||to convey by pipeline|
|5.||to supply with a pipeline|
in the pipeline
In process, under way, as in The blueprints for the new machine are in the pipeline, but it will take months to get approval. [Colloquial; 1940s] Also see in the works.
Budgeted for something but not yet spent, as in There's $5 million more in the pipeline for the city schools. [Colloquial; second half of 1900s]