n. | 1. | Intermediate action. |
2. | Mutual or reciprocal action or influence; | |
3. | (Physics) The effect, such as exertion of a force, that one object exerts on another, especially the capture or emission of a particle. | |
4. | Communication between people, or the actions of people that affect others. |
Noun | 1. | interaction - a mutual or reciprocal action; interacting |
2. | interaction - (physics) the transfer of energy between elementary particles or between an elementary particle and a field or between fields; mediated by gauge bosons Synonyms: fundamental interaction |