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[Anglo-French perjurie parjurie, from Latin perjurium, from perjurus deliberately giving false testimony, from per- detrimental to + jur- jus law]
: the act or crime of knowingly making a false statement (as about a material matter) while under oath or bound by an affirmation or other officially prescribed declaration that what one says, writes, or claims is true compare false swearing
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.