1.NounA statistical measure of the weight of a person scaled according to height, used to estimate if a person is underweight or overweight. BMI units are defined as
k
g
/
m
2
{\displaystyle \mathrm {kg} /\mathrm {m} ^{2}}
≈
703
∗
l
b
/
i
n
2
{\displaystyle \mathrm {703*lb} /\mathrm {in} ^{2}}
.