n. 1 prevarication, fibbing, mendacity, mendaciousness, falsification, untruthfulness, perjury; dishonesty, deceit, duplicity She was accused of lying while under oath
adj. 2 untruthful, false, mendacious, hypocritical, dishonest, deceitful, deceptive, duplicitous, treacherous, perfidious Whoever told you they had found the solution is a lying scoundrel