noun

1. A gradual diminishing of strength.

2. A reduction in the level of some property with distance, especially the amplitude of a wave or the strength of a signal.

3. A weakening in the virulence of a pathogen or other microorganism.

4. The tapering of a leaf etc to a fine point.

5. A fabrication process in which a material is stretched out into a thin shape.

6. The reduction of the active principles of medicines to minute doses.

7. The proportion of sugar that is converted to ethanol by a yeast.