A line of performers in a revue or other show, dancing in unison.(noun)
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Use "chorus line" in a sentence
"Surrounded by his staff and the admirals and captains of the fleet, he sat in a big armchair placed in the front row, smoking his after-dinner cigarette in a holder while he roared at a chorus line of bare-kneed midshipmen."
"A chorus line of Mexican Madonna daughters knelt in front of their mothers wearing fierce, take-no-shit smiles, except Aurora, who resented being there and resented kneeling in front of me."