backreaction in English dictionary backreaction Meanings and definitions of "backreaction" (physics) The reaction, as a result of Newton's third law, back from a radiating gravitational wave noun (physics) The reaction, as a result of Newton's third law, back from a radiating gravitational wave more Grammar and declension of backreaction backreaction ( plural backreactions) backreaction (plural backreactions) more Sample sentences with "backreaction" Declension Stem Try again Authors