- 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.
intransitive verbin·ter·played, in·ter·play·ing, in·ter·plays
(third-person singular simple present interplays, present participle interplaying, simple past and past participle interplayed)
- to interact