a. [ L. mendax, -acis, lying, cf. mentiri to lie. ] 1. Given to deception or falsehood; lying; as, a mendacious person. [ 1913 Webster ]
2. False; counterfeit; containing falsehood; as, a mendacious statement. [ 1913 Webster ]
-- Men*da"cious*ly, adv. -- Men*da"cious*ness, n. [ 1913 Webster ]