What does RESISTANCE mean?

noun

1. the action of opposing something that you disapprove or disagree with“he encountered a general feeling of resistance from many citizens”
2. any mechanical force that tends to retard or oppose motion
3. a material's opposition to the flow of electric current; measured in ohms
4. the military action of resisting the enemy's advance“the enemy offered little resistance”
5. (medicine) the condition in which an organism can resist disease
6. the capacity of an organism to defend itself against harmful environmental agents“these trees are widely planted because of their resistance to salt and smog”
7. a secret group organized to overthrow a government or occupation force
8. the degree of unresponsiveness of a disease-causing microorganism to antibiotics or other drugs (as in penicillin-resistant bacteria)