Definition of return stroke in US English:

return stroke

noun

  • 1A movement in which a piston or other reciprocating part returns to a previous position.

  • 2An act of striking back; a blow given in return for one received.

  • 3Meteorology. The principal discharge in a lightning stroke, occurring after the leader stroke reaches the ground or an object, and carrying the main current upwards from the ground or object to the cloud.

Origin

Early 19th century; earliest use found in The Repertory of Arts. From return + stroke.

Pronunciation

return stroke

/rɪˈtəːn ˌstrəʊk/