What is the meaning of pelting?

noun

• Anything happening rapidly or in quick successive.
  • usage: "a rain of bullets"; "a pelting of insults"
  • synonyms: rain

verb

• Cast, hurl, or throw repeatedly with some missile.
  • usage: "They pelted each other with snowballs"
  • synonyms: pelt, bombard
• Attack and bombard with or as if with missiles.
  • usage: "pelt the speaker with questions"
  • synonyms: pepper, pelt
• Rain heavily.
  • usage: "Put on your rain coat- it's pouring outside"
  • synonyms: pour, pelt, stream, rain cats and dogs, rain buckets