1. Regarding something or someone that refuses to accept: Mary and Jill were very resistant to watching films that were full of crime, very aggressive, and bloody!
2. Descriptive of that which is immune to a chemical, disease, drug, etc.: The plant Jill had in her garden was quite resistant to destruction by aphids because she used ladybugs to feed on those pests!
3. Concerning the inadequacy in mixing with or soaking up something: The plastic jug Mary used was resistant to the heat in the microwave and did not melt at all!