rotten borough

Definition of Rotten Borough in English :

1. rotten borough

an English parliamentary constituency with few electors

WordNet Lexical Database for English. Princeton University. 2010.

Rotten Borough

noun

(before the Reform Act of 1832) any of certain English parliamentary constituencies with only a very few electors

Compare pocket borough

1.

in England (before the Reform Act of 1832), a borough with only a few voters but with the right to send a representative to Parliament

2.

any electoral district or political unit with greater representation than its population warrants

n.

An election district having only a few voters but the same voting power as other more populous districts.