Define "BMI" and its significance.

Body Mass Index, commonly referred to as BMI, is a key measurement that assesses an individual's body weight in relation to their height. It is calculated by taking a person's weight in kilograms and dividing it by the square of their height in meters. This simple calculation provides a number that is used to categorize individuals into different weight categories, such as underweight, normal weight, overweight, or obese.

The significance of BMI lies in its utility as a general indicator of body fat and a predictor of various health outcomes. Higher BMI values are often associated with increased risk of health issues such as heart disease, diabetes, and certain cancers. Conversely, a lower BMI can indicate nutritional deficiencies and other health problems.

BMI is widely used in both clinical and public health settings as a screening tool to identify individuals who may benefit from further assessment regarding their weight and health. It plays an important role in guiding interventions and lifestyle changes aimed at improving overall wellness.