'Interaction' definitions:

Definition of 'interaction'

From: WordNet
noun
A mutual or reciprocal action; interacting
noun
(physics) the transfer of energy between elementary particles or between an elementary particle and a field or between fields; mediated by gauge bosons [syn: interaction, fundamental interaction]

Definition of 'Interaction'

From: GCIDE
  • Interaction \In`ter*ac"tion\, 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]