Marbury v Madison
/ˌmɑːbri vɜːsəs ˈmædɪsn/, /ˌmɑːbri viː ˈmædɪsn/
/ˌmɑːrbəri vɜːrsəs ˈmædɪsn/, /ˌmɑːrbəri viː ˈmædɪsn/
- an important US Supreme Court case in 1803 which established its right to decide if a new law is illegal under the American Constitution. William Marbury had taken Secretary of State James Madison to court because he refused to keep an agreement that Marbury would become a judge. The court decided that Marbury was right, and established the principle of judicial review.