Synonyms: interaction
Definition: a mutual or reciprocal action; interacting
Similar words: action
Definition: something done (usually as opposed to something said)
Usage: there were stories of murders and other unnatural actions
Synonyms: fundamental interaction, interaction
Definition: (physics) the transfer of energy between elementary particles or between an elementary particle and a field or between fields; mediated by gauge bosons
Similar words: physical phenomenon
Definition: a natural phenomenon involving the physical properties of matter and energy