What is the meaning of bombardment?

noun

• The rapid and continuous delivery of linguistic communication (spoken or written. )
  • usage: "a barrage of questions"; "a bombardment of mail complaining about his mistake"
  • synonyms: barrage, outpouring, onslaught
• The heavy fire of artillery to saturate an area rather than hit a specific target.
  • usage: "they laid down a barrage in front of the advancing troops"; "the shelling went on for hours without pausing"
  • synonyms: barrage, barrage fire, battery, shelling
• The act (or an instance) of subjecting a body or substance to the impact of high-energy particles (as electrons or alpha rays. )
• An attack by dropping bombs.
  • synonyms: bombing