Estimates of forest area vary according to source and definition. How forest is defined can influence how deforestation, reforestation and afforestation can be interpreted. This paper, for example, illustrates some of the difference for estimates of forest land in Turkey and the Food and Agriculture Organization (FAO) of the United Nations and how different definitions of forest may be interpreted for deforestation, reforestation, and afforestation. Lastly I provide some suggestions for developing clearer definitions. Forest, deforestation, reforestation, afforestation, Turkey.