Simple past tense and past participle of chorus.(verb)
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Use "chorussed" in a sentence
"Honor had a very tender tolerance -- had 'chorussed' themselves hoarse and thirsty; and were receiving the reward of the public-spirited out of long misty tumblers, that fizzed and bubbled."
""How can that be, O Bawn?" the women chorussed indignantly."
""How'd yeh know?" and, "My, ain't cheh a mind-reader!" the girls chorussed."