definition of
[onrush]

[1] #1 onrush n. [attack, onslaught, onset] (military) an offensive against an enemy (using weapons); "the attack began at dawn". wn

[2] #2 onrush n. 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". wn