Definition of "in unison" []

• In agreement; agreeing in tone; in concord. (noun)

Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)

• "The harmful effects of endocrine disruptors are increased two-to threefold when these different chemicals act in unison to block endocrine receptors from normal functioning."
• "Chiming in unison with the raindrops, the most soothing music rippled down the hall."
• "“Unpretty,” T.W. said in unison with his assistant."