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

Similar word(s): attack, onset, onslaught

Definition categories: act, operation

2. a forceful forward rush or flow

- from the bow she stared at the mesmerising onrush of the sea where it split and foamed

- the explosion interrupted the wild onrush of her thoughts

Definition categories: event, rush, spate, surge, upsurge