Definition of "attenuation"

A gradual diminishing of strength.  examples

(physics) A reduction in the level of some property with distance, especially the amplitude of a wave or the strength of a signal.  examples

(biology) A weakening in the virulence of a pathogen or other microorganism.

(botany) The tapering of a leaf etc to a fine point.  examples

(engineering) A fabrication process in which a material is stretched out into a thin shape.  examples

(homeopathy) The reduction of the active principles of medicines to minute doses.  examples

(brewing) The proportion of sugar that is converted to ethanol by a yeast.  examples