retroaction noun. [rɛtrǝʊ'akʃ(ǝ)n] L16.
[formed as RETROACT + ACTION. Cf. French rétroaction.]
1. (A) return action, (a) reaction, (a) response. L16.
b. Psychology. The (usu. deleterious) effect of later learning on the memory of what was learned previously. M20.

2. A retrospective action. Now rare. E18.

► Sense 1 in isolated use before E19.

[TahlilGaran] English Dictionary ▲