American English

Definition of boom verb from the Oxford Advanced American Dictionary



    Verb Forms present simple I / you / we / they boom
    he / she / it booms
    past simple boomed
    -ing form booming
    jump to other results
    make loud sound
  1. 1[intransitive] to make a loud, deep sound Outside, thunder boomed and crashed.
  2. 2[transitive, intransitive] to say something in a loud, deep voice + speech “Get out of my sight!” he boomed. boom (out) A voice boomed out from the darkness. He had a booming voice.
  3. of business/economy
  4. 3[intransitive] to have a period of rapid growth; to become bigger, more successful, etc. By the 1980s, the computer industry was booming. Business is booming!
See the Oxford Advanced Learner's Dictionary entry: boom