Resistance

• Acoustics:

1. That quality of electrical or acoustical circuits that results in dissipation of energy through heat.
2. Something that hinders something else. Specifically, the measure of something that inhibits electricity from flowing in a wire or a DC circuit. Abbreviated "R". Source: Church Audio & Acoustics Glossary

• Electronics:

1. The ohmic opposition to dc or ac.

• For plants and animals, the ability to withstand poor environmental conditions or attacks by chemicals or disease. May be inborn or acquired.
  Source: Terms of the Environment
• Failure of a cancer to shrink after treatment.