Resistance is a noun that refers to the act or power of resisting, opposing, or withstanding something.
In physics, resistance is a measure of the opposition to current flow in an electrical circuit.
The term "resistance" also refers to:
1. The refusal to accept or comply with something
2. The ability not to be affected by something, especially adversely
3. A secret organization resisting authority, especially in an occupied country
4. In biology, the ability of an organism to withstand the effect of a harmful agent