Definition of "byplay" [by•play]

• Any action, carried out onstage during a performance, apart from the main action. (noun)

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• "They're watching for Baker and his byplay with the suspects and co-star Robin Tunney — and for a show that, while not a great drama, is a terrific antidote to tough times."
• "One has the cringing sense that Ms. Zanganeh is trying to imitate Nabokov himself, who was given to minutely observed descriptive prose and who opened his famous novel with phonetic byplay."
• "After his opening remarks, frequently some byplay with Hank teasing the band about everything from their haircuts to how sleepy they all were at 7 a.m.,"