n.
Pronunciation: ' än- ˌ slo ̇ t, ' o ̇ n-
Function: noun
Etymology: modification of Dutch aanslag act of striking; akin to Old English an on and to Old English sl ē an to strike ― more at SLAY
Date: circa 1625
: an especially fierce attack also : something resembling such an attack <an onslaught of technological changes>