well I hope im giving you the correct definition...
something that is elastic can be stretched or compressed.
For example a bungee cord(search up). It resists the change of shape even when stretched and compressed. And because of that it applies a counter force in the opposite direction in which you would call a elastic force.
Something that is elastic can return to its original shape after being stretched or compressed. ... As you stretch or compress an elastic material like a bungee cord, it resists the change in shape. It exerts a counter force in the opposite direction. This force is called elastic force .
