Resistivity is the inherent property of a material that determines its ability to resist [forcefully oppose or stop] the flow of electric current [the flow of electric charge].
For example, materials like metals have low resistivity, allowing electric current to flow easily through them. In contrast, materials like rubber or plastic have high resistivity, making it difficult for electric current to pass through.
Very Simple Definition:
Resistivity is how hard it is for electricity to flow through a specific material.
For example, metals let electricity flow easily (low resistivity), while rubber or plastic do not (high resistivity).