- interaction - a mutual or reciprocal action; interacting
--1 is a kind of action
--1 has particulars:interplay; contact; interchange, reciprocation, give-and-take Derived form: verb interact1 - interaction, fundamental interaction - (physics) the transfer of energy between elementary particles or between an elementary particle and a field or between fields; mediated by gauge bosons
--2 is a kind of physical phenomenon
--2 has particulars:electromagnetic interaction; gravitational interaction; strong interaction, strong force, color force; weak interaction, weak force