single-member district

noun
variants: or less commonly single-member constituency

Definition of single-member district

: an electoral district or constituency having a single representative in a legislative body rather than two or more In its first case declaring multimember districts unconstitutional in 1973, the Supreme Court declared that the Texas system of electing state representatives from county multimember districts, rather than single-member districts, discriminated against African-Americans and Latinos.— Al Kauffman — compare multimember district

First Known Use of single-member district

1874, in the meaning defined above

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