What do Unicameral and Bicameral mean?

Answer 1

In democratic and republican forms of government the will of the people is expressed and legislated through parliaments and houses of representatives. In some governments these institutions are single, that is unicameral house. In others they are two houses, of a lower and upper. The United States and United Kingdom have bicameral legislatures, for example.

Answer 2

Uni means one and bi means two. Two houses of lawmakers vs. one as in South Korea.