To conduct a surprise attack or incursion into a place, typically to seize something or to cause disruption. The police raided the warehouse to confiscate the illegal goods.
To enter a place suddenly and forcefully in order to steal or take something. The pirates raided the coastal village, taking valuables and supplies.
To make a sudden attack on an enemy in warfare. The soldiers raided the enemy camp under the cover of darkness.
To quickly and illicitly take something from a place. The children raided the cookie jar when their parents weren't looking.
(Finance) To attempt to gain control of a company by rapidly buying a substantial number of its shares. The activist hedge fund raided the firm, purchasing 20% of its stock in a single week.