noun on·slaught \ˈän-ˌslt, ˈn-\

: a violent attack

Full Definition of ONSLAUGHT

:  an especially fierce attack; also :  something resembling such an attack <an onslaught of technological changes>

Examples of ONSLAUGHT

  1. an onslaught by the enemy
  2. <the massive onslaught of enemy troops caught the country by surprise>


modification of Dutch aanslag act of striking; akin to Old English an on and to Old English slēan to strike — more at slay
First Known Use: circa 1625
ONSLAUGHT Defined for Kids


noun on·slaught \ˈän-ˌslt, ˈn-\

Definition of ONSLAUGHT for Kids

:  a violent attack


Next Word in the Dictionary: onstPrevious Word in the Dictionary: on–siteAll Words Near: onslaught
July 01, 2015
precarious Hear it
not certain, secure, or steady
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears