Definitions of trumpet:

• noun:   a brass musical instrument with a brilliant tone; has a narrow tube and a flared bell and is played by means of valves
• verb:   utter in trumpet-like sounds

  Example: "Elephants are trumpeting"

• verb:   proclaim on, or as if on, a trumpet

  Example: "Liberals like to trumpet their opposition to the death penalty"

• verb:   play or blow on the trumpet