Definitions of trump:

• noun:   a playing card in the suit that has been declared trumps
• 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:   produce a sound as if from a trumpet
• verb:   proclaim or announce with or as if with a fanfare
• verb:   play a trump
• verb:   get the better of
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #8608)