[ uh-ten-yoo-ey-shuhn ]
See synonyms for attenuation on
  1. the act of attenuating or the state of being attenuated.

  2. the process by which a virus, bacterium, etc., changes under laboratory conditions to become harmless or less virulent.

  1. Physics. a decrease in a property, as energy, per unit area of a wave or a beam of particles, occurring as the distance from the source increases as a result of absorption, scattering, spreading in three dimensions, etc.

Origin of attenuation

1585–95; (<Middle French ) <Latin attenuātiōn- (stem of attenuātiō). See attenuate, -ion

Other words from attenuation

  • sub·at·ten·u·a·tion, noun

Words Nearby attenuation Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use attenuation in a sentence

British Dictionary definitions for attenuation


/ (əˌtɛnjʊˈeɪʃən) /

  1. the act of attenuating or the state of being attenuated

  2. the loss of energy suffered by radiation as it passes through matter, esp as a result of absorption or scattering

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012