onrush meaning and definition

ONRUSH noun

Definition of onrush (noun)

1. (military) an offensive against an enemy (using weapons)
   • "the attack began at dawn"
   • synonyms: attack, onset, onslaught
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"