1.VerbTo dislodge or remove (someone) from a seat, especially on horseback.
"The frightened horse reared up and unseated its rider.; I was unseated from my bike after hitting an unexpected pothole."
2.VerbTo remove (someone) from an office or position, especially a political one; to dethrone.
"After having lost her seat to a Tory, she succeeded in unseating him in the next general election.; India has recently unseated China as the world’s most populous country.; The Michelson-Morley experiment prompted scientists to unseat their belief in the luminiferous aether.; Printed newspapers are gradually being unseated by digital publications.; The Matrix (1999) utterly unseated audiences around the world with its mind-blowing plot twist.; I was somewhat unseated by the strange noises outside my window."
3.VerbTo remove (someone) from an office or position, especially a political one; to dethrone.
"After having lost her seat to a Tory, she succeeded in unseating him in the next general election.; India has recently unseated China as the world’s most populous country."
4.VerbTo cause (something) to be removed or replaced in its role; to displace, to overturn.
"The Michelson-Morley experiment prompted scientists to unseat their belief in the luminiferous aether.; Printed newspapers are gradually being unseated by digital publications."
5.VerbTo upset the composure of (someone); to astound, to shock, to unsettle.
"The Matrix (1999) utterly unseated audiences around the world with its mind-blowing plot twist.; I was somewhat unseated by the strange noises outside my window."
6.VerbTo come off or out of a seat.
"We replaced the screws, since the old ones unseated too easily."