Simple past tense and past participle of dethrone.(verb)
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Use "dethroned" in a sentence
"An unexpected best-seller, "Crockery Cookery" dethroned "The Joy of Sex" as the No. 1 selling trade paperback in June of 1975, providing a clue as to which is the stronger human urge."
"In $56.6 Million Debut Weekend Associated Press LOS ANGELES -- "The Chronicles of Narnia: Prince Caspian" dethroned "Iron Man" as ruler at the box office, pulling down $56.6 million, according to studio estimates Sunday."
"Holomisa said when he was "dethroned" he received a lot of messages calling for the establishment of a new political party."