Definition of attenuation in US English:



  • 1The reduction of the force, effect, or value of something.

    ‘human security required the attenuation of a wide range of threats to people’
    • ‘He believed that true internationalism would result only through the attenuation of nationalism.’
    • ‘Previous studies in adults have demonstrated marked attenuation of this reflex, even in the lighter stages of sleep.’
    • ‘Attenuation of pelvic girdle pain was greatest in the acupuncture group.’
    • ‘The heavier cognitive load required to create these relationships may have resulted in a certain attenuation in motivation.’
    • ‘This complete attenuation of human impulse speaks volumes.’
    • ‘Relationship skills acquired through relationship education are maintained over a period of some years, though attenuation of training effects may occur over a 5 to 10 year period.’
    • ‘It is possible that it is not age itself that causes the attenuation of creativity.’
    • ‘The statistics emerging from the present survey does suggest some attenuation in the level of public dissatisfaction with sentence severity.’
    • ‘Fathers often have expressed fear of the potential attenuation of their relationships with their children.’
    • ‘The narcotic drugs produce an excellent blend of direct pain reduction and the attenuation of the psychological trauma associated with pain.’
    1. 1.1 The reduction of the amplitude of a signal, electric current, or other oscillation.
      ‘the products are used mostly by aircraft manufacturers for noise attenuation in engine housings’
      count noun ‘attenuations of the order of 50 to 200 dB are required’
      • ‘The attenuation also varies with the actual wavelength selected.’
      • ‘The muffs have excellent noise attenuation in that they will bring the decibels down to a tolerable level.’
      • ‘We directly measured the attenuation of light.’
      • ‘This could be the result of multiple reflections on obstacles, or attenuations inherent to the broadcasting medium.’
      • ‘The degree of attenuation is going to depend on a number of things including antenna size.’