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In [[physics]], '''mass''' (from Ancient [[Greek]] μᾶζα) commonly refers to any of three properties of [[matter]], which have been shown [[experiment]]ally to be equivalent: ''inertial mass'', ''active gravitational mass'' and ''passive gravitational mass''. In everyday usage, mass is often taken to mean [[weight]], but in [[scientific]] use, they refer to different properties.

In [[physics]], '''mass''' (from Ancient [[Greek]] μᾶζα) commonly refers to any of three properties of [[matter]], which have been shown [[experiment]]ally to be equivalent: ''inertial mass'', ''active gravitational mass'' and ''passive gravitational mass''. In everyday usage, mass is often taken to mean [[weight]], but in [[scientific]] use, they refer to different properties.