PESTILENT Meaning of PESTILENT in English a. 1.Pestilential, contagious, infectious, malignant.2.Mischievous, noxious, evil, injurious, malign, deadly.3.Troublesome, mischievous, corrupt, pernicious, vexatious. Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012