Definition of pipelines:
(n) :
A conduit made of pipes used to convey water, gas or petroleum, etc.
(n) :
A channel (either physical or logical) by which information is transmitted sequentially (that is, the first information in is the first information out).
(n) :
(figurative) A system or process through which something is conducted.
(n) :
(figuratively) A continuous, contributing source of benefits, talent, or innovation.
(n) :
(figurative) A widely observed pattern of development in personal interests, circumstances, or opinions.
(v) :
(transitive) To convey by a system of pipes.