from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The act or process of interacting.
- n. The state of undergoing interaction.
- n. Physics Any of four fundamental ways in which elementary particles and bodies can influence each other, classified as strong, weak, electromagnetic, and gravitational.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. 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.
- n. A conversation or exchange between people.
from the GNU version of the Collaborative International Dictionary of English
- n. Intermediate action.
- n. Mutual or reciprocal action or influence.
- n. The effect, such as exertion of a force, that one object exerts on another, especially the capture or emission of a particle.
- n. Communication between people, or the actions of people that affect others.
from The Century Dictionary and Cyclopedia
- n. Mutual or reciprocal action; action or influence of things upon each other.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a mutual or reciprocal action; interacting
- n. (physics) the transfer of energy between elementary particles or between an elementary particle and a field or between fields; mediated by gauge bosons
inter- + action (Wiktionary)