- The definition of interplay is the way two or more things relate to each other or affect each other.
When plot and characters relate well to each other and keep a book moving along, this is an example of a situation where there is a good interplay between plot and characters.
interplay definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
action, effect, or influence on each other or one another; interaction
to exert influence reciprocally
interplay definition by American Heritage Dictionary
Reciprocal action and reaction; interaction.intransitive verb in·ter·played, in·ter·play·ing, in·ter·plays
To act or react on each other; interact.