The definition of carbon dating is measuring how much radioactive carbon is present in carbon-based remains to make an informed guess about their age.
An example of carbon dating is what scientists use to make an informed guess about the age of dinosaur bones.
a method of establishing the approximate age of carbonaceous materials, such as fossil remains or archaeological specimens, by measuring the amount of radioactive carbon-14 remaining in them
also carbon-14 dating
See radiocarbon dating.