1. a sudden and severe onset of trouble

Definition categories: event, trouble

2. (military) an offensive against an enemy (using weapons)

Similar word(s): attack, onrush, onset

Definition categories: act, operation

3. the rapid and continuous delivery of linguistic communication (spoken or written)

Similar word(s): barrage, bombardment, outpouring

Definition categories: communication, language

Sentences with onslaught as a noun:

- They opened the doors and prepared for the onslaught of holiday shoppers.