1. (

• attack ,
• onslaught ,
• onset ,
• onrush

) (military) an offensive against an enemy (using weapons); "the attack began at dawn" ;

2. (

• onrush

) 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" ;