Definition of body mass index noun from the Oxford Advanced Learner's Dictionary


body mass index

BrE BrE//ˈbɒdi mæs ɪndeks//
; NAmE NAmE//ˈbɑːdi mæs ɪndeks//
(abbreviation BMI)
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an approximate measure of whether somebody weighs too much or too little, calculated by dividing their weight in kilograms by their height in metres squared
See the Oxford Advanced American Dictionary entry: body mass index