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invalid [ˈɪn.və.lɪd] n
comp., MS	ໃຊ້ບໍ່ໄດ້ (Erroneous or unrecognizable because of a flaw in reasoning or an error in input. Invalid results, for example, might occur if the logic in a program is faulty)
English thesaurus
invalid ['ɪnvə'li:d] abbr.
abbr., IT	inval