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say it: OH-vur-turn
overturn is a verb and noun meaning "turn from an upright or normal position". It carries 8 recorded senses.
cause to overturn from an upright or normal position
“The cat knocked over the flower vase”
“the clumsy customer turned over the vase”
“he tumped over his beer”
cause the downfall of; of rulers
“The Czar was overthrown”
“subvert the ruling class”
change radically
“E-mail revolutionized communication in academe”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for overturn come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.