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| pre·sump·tion [ pri zúmpshən ] (plural pre·sump·tions) |
noun |
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| Definition: |
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1. something believed without actual evidence: a belief based on the fact that something is considered to be extremely reasonable or likely
 I acted on the presumption that their IDs were genuine.
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2. law legal inference: an inference that something is the case, in the absence of evidence rebutting that assumption and on the basis of other known facts
 a presumption of innocence
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3. rudeness or arrogance: behavior that is inconsiderate, disrespectful, or overconfident
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| [12th century. Via French< Latin praesumption-< praesumere (see presume)] |