Definition of decibel noun from the Oxford Advanced American Dictionary

 

decibel

 noun
noun
NAmE//ˈdɛsəbl//
 
, NAmE//ˈdɛsəˌbɛl//
 
 
jump to other results
a unit for measuring how loud a sound is Noise from the club reached 110 decibels. Gary's voice rose several decibels as he finally lost patience with them.
See the Oxford Advanced Learner's Dictionary entry: decibel