As per the classical definition of Nastik as per Hindu theology is "Nastiko ved Nindakah". I.e one who criticize Veda and not the one who doesn't believe in god.
Nastik ra n pure philosophical terms is "One who doesn't recognise anything except direct evidence as proof" i.e An atheist accepts only direct perception (what can be seen, experienced, or proven through observation) as valid proof, and does not accept any other authority or source of knowledge as proof.” in other word " He doesn't accept any logical deduction as proof".
Now explain me in which term do you call
@Sharma Ji a Nastik?