interaction

The act or process of interacting.

The state of undergoing interaction.

Mutual or reciprocal action; action or influence of things upon each other.

Intermediate action.

Mutual or reciprocal action or influence.

The effect, such as exertion of a force, that one object exerts on another, especially the capture or emission of a particle.

Communication between people, or the actions of people that affect others.

The situation or occurrence in which two or more objects or events act upon one another to produce a new effect; the effect resulting from such a situation or occurrence.