Hvad er trumpet? Hvad er trumpet? Music A soprano brass wind instrument consisting of a long metal tube looped once and ending in a flared bell, the modern type being equipped with three valves for producing variations in pitch.Something shaped or sounding like this instrument.Music An organ stop that produces a tone like that of the brass wind instrument.A resounding call, as that of the elephant.Music To play a trumpet.To give forth a resounding call.To sound or proclaim loudly.