Definition of "interact" []

• To act on each other: "More than a dozen variable factors could interact, with their permutations running into the thousands” ( Tom Clancy). (verb-intransitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "But if I had to choose it would be the Montgommerys and the Taggarts from Jude Deveraux I think, the way those families interact is fantastic reading and I wouldn't mind seeing that in reality."
• "As with trial testimony, job interviews, and blind dates, seeing people interact is the only way to understand what is going on."
• "How he and Tavi interact is integral to the story, and needs to be developed even further."