To take aggressive action against a place or enemy with weapons or armed force. The army planned to attack the enemy base at dawn.
To criticize or oppose fiercely and publicly. The politician attacked his opponent's policies during the debate.
To begin to deal with a problem or task in a determined way. She decided to attack the pile of paperwork on her desk first thing in the morning.
To act on something with harmful or destructive intent. The virus is known to attack the body's immune system.