cause (a musical instrument) to become out of tune
I'm off to detune my guitar and annoy the neighbours
detuned guitars that sound like they were strung with barbed wire
reduce the performance or efficiency of (a motor vehicle or engine) by adjustment
we've detuned the engines a bit for reliability
a detuned version of a professional rally racer
change the frequency of (an oscillatory system such as a laser) away from a state of resonance
diode lasers can be detuned faster than standard lasers