return path

English

Noun

return path (plural return paths)

(electricity) The route by which a current or signal returns to its source, or to earth.
- 2012, Andrew Martin, Underground Overground: A passenger's history of the Tube, Profile Books, →ISBN, page 136:
  The inner, or negative, rail is also known as the 'current return' rail, because electrical current needs a circuit - a return path to earth, in other words.

References

“return path” in Lexico, Dictionary.com; Oxford University Press.

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