Question

if a body has infinite heat capacity?what does it signify?

Answer 1

the substance which hasa defined specific geat/heat capacity can GAIN or LOSE heat(exchange heat)

Answer 2

Yeah right, salini. Heat capacity is the amount of heat required to change the temperature of a body by 1 degree kelvin.
But if a body has infinite heat capacity, it means that whatever amount of heat you provide to the body, its temperature will not change. It has a capacity to absorb infinite amount of heat without changing its temperature.