from The Century Dictionary.

  • noun The act or process of making slender, thin, or lean; the state of being thin; emaciation; reduced thickness or proportions.
  • noun The act of making fine by comminution or attrition.
  • noun The act or process of lessening in complexity or intensity; reduction of force, strength, or energy; specifically, in homeopathy, the reduction of the active principle of medicines to minute or infinitesimal doses.
  • noun The act of making thin or thinner, as a fluid, or the state of being thin or thinned; diminution of density or viscidity: as, the attenuation of the humors; specifically, in brewing and distilling, the thinning or clarifying of saccharine worts by the conversion of the sugar into alcohol and carbonic acid.
  • noun In electricity: The decrease of telephonic currents with increasing distance, due to the absorption of current by the electrostatic capacity of the telephone line.
  • noun More generally, the decrease of electrical effects with increasing distance.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The act or process of making slender, or the state of being slender; emaciation.
  • noun The act of attenuating; the act of making thin or less dense, or of rarefying, as fluids or gases.
  • noun The process of weakening in intensity; diminution of virulence.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A gradual diminishing in the strength of something.
  • noun physics A reduction in the level of some property with distance, especially the amplitude of a wave or the strength of a signal.
  • noun biology A weakening in the virulence of a pathogen or other microorganism.
  • noun botany The tapering of a leaf etc to a fine point.
  • noun engineering A fabrication process in which a material is stretched out into a thin shape.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the property of something that has been weakened or reduced in thickness or density
  • noun weakening in force or intensity


from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin attenuātiō ("a diminishing")


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