SINCE 1828
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
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