In chorus Definition 1 of 2Pro Tip 1/3Group Expression Used when a group expresses the same sentiment or action at once, showing unity. The protesters voiced their demands in chorus. Pro Tip 2/3Amplified Impact The phrase can emphasize the strength or power of people acting together. The crowd's cheers in chorus filled the stadium. Pro Tip 3/3Cultural Events Commonly used during performances or events involving music or coordinated speech. The choir sang the national anthem in chorus.