GNU Collaborative International Dictionary of English

Found one definition

1.       
   Interaction (?), n.
   1. Intermediate action.
   
   [1913 Webster]
   
   
   2. Mutual or reciprocal action or influence; as, “the interaction of the heart and lungs on each other”.
   
   [1913 Webster]
   
   
   3. Hence: (Physics) The effect, such as exertion of a force, that one object exerts on another, especially the capture or emission of a particle.
   
   [PJC]
   
   
   4. Communication between people, or the actions of people that affect others.
   
   [PJC]