Law Dictionary

expressio unius est exclusio alterius

noun ex·pres·sio uni·us est ex·clu·sio al·ter·i·us \ ik-ˈspre-shē-ō-yu̇-ˈnī-əs-ˌest-ik-ˈsklü-zē-ō-ȯl-ˈtir-ē-əs, ek-ˈspre-sē-ō-ü-ˈnē-u̇s-ˌest-ek-ˈsklü-sē-ō-äl-te-ˈrē-u̇s \

legal Definition of expressio unius est exclusio alterius

:a principle in statutory construction: when one or more things of a class are expressly mentioned others of the same class are excluded

Origin and Etymology of expressio unius est exclusio alterius

New Latin, the explicit mention of one (thing) is the exclusion of another


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