Do blood thinners like aspirin really thin the blood?

Despite being the oldest type of antiplatelet medication, aspirin is still the gold standard all newer antiplatelets are measured against. — TNS

I was recently prescribed a blood thinner. The thought of it makes me quite concerned. What is a blood thinner?

Blood thinners are a type of medicine that helps your blood flow smoothly through your blood vessels. They are prescribed to those patients who have certain types of heart disease and heart defects, and also, a risk of stroke. Millions of people take blood thinners every year.