Definition of

Weight

Weight
How heavy something is. The downward force caused by gravity on an object.

Weight and Mass are different things, but weighing scales are designed to estimate the mass sitting on them and so (instead of units of force) it is common to use units of mass:
• grams, kilograms and tonnes (in Metric)
• ounces, pounds and tons (in US units)

This bar of gold has a mass of 1 kg, and weighing scales will also show 1 kg under steady conditions here on Earth.
See: Mass

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