Definify.com
Webster 1913 Edition
Pestilential
Pesˊti-len′tial
,Adj.
[Cf. F.
pestilentiel
.] 1.
Having the nature or qualities of a pestilence.
“Sends the pestilential vapors.” Longfellow.
2.
Hence: Mischievous; noxious; pernicious; morally destructive.
So
pestilential
, so infectious a thing is sin. Jer. Taylor.
Webster 1828 Edition
Pestilential
PESTILEN'TIAL
,Adj.
1.
Producing or tending to produce infectious disease; as pestilential vapors.2.
Mischievous; destructive; pernicious.