Definition of "Resistant" :

adjective: incapable of absorbing or mixing with

"Plastic highly resistant to steam and water."

adjective: disposed to or engaged in defiance of established authority

adjective: impervious to being affected

"Resistant to the effects of heat."

adjective: relating to or conferring immunity (to disease or infection)

adjective: able to tolerate environmental conditions or physiological stress

"The new hybrid is more resistant to drought."