It is a chronic and complex condition known as the accumulation of excess fat in the body to a level that impairs health.
Obesity is a highly complex, chronic, and highly recurrent disease defined by excessive and abnormal fat accumulation that can significantly compromise health, moving beyond being merely an aesthetic concern.
In adults, it is generally measured using the Body Mass Index (BMI) calculation. Body Mass Index is calculated by dividing weight by the square of height ($kg/m^2$). If the BMI is 30 or above, the condition is termed Obesity.
Today, obesity has become one of the leading causes of preventable deaths by increasing the risk of developing Type 2 Diabetes, Heart Disease, Stroke, and certain types of Cancer.