For specific occasion (in this paper, in this essay,in the present study, etc.); 1.2 At the absence of theoretical Operational definition; /working definition Self-nominated,usually marked with‘the working definition'or‘the operational definition'; 1.2 Operational /working definition  For specific occasion (in this paper, in this essay, in the present study, etc.);  At the absence of theoretical definition;  Self-nominated, usually marked with ‘the working definition’ or ‘the operational definition’;