Body mass index,or BMI, is a measure of a person's weight in relation to height.

VOA: special.2011.02.15

When Kitty was 9 years old, her father taught her a trick to measure the height of the windmill on her grandfather's farm: Measure its shadow and compare it with the shadow of a yardstick.

FORBES: The Universe and Mrs. Ferguson

Surveyors also use them to measure height differences over large distances.

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To determine the price target from this formation, measure the height of the flagpole, which is defined as the distance from the breakout above resistance to the first high, which is labeled line 1.

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