per·ju·ry   (pûr'jə-rē)    n.   pl. per·ju·ries Law The deliberate, willful giving of false, misleading, or incomplete testimony under oath. The breach of an oath or promise. [Middle English periurie, from Anglo-Norman, from Latin periūrium, from periūrāre, to perjure; see perjure.] per·ju'ri·ous (pər-jŏŏr'ē-əs) adj., per·ju'ri·ous·ly adv.

perjury 

Main Entry: per·ju·ry
Pronunciation: 'p&r-j&-rE
Function: noun
Inflected Form: plural -ries
Etymology: 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