• Opposition (astronomy), a term describing the position of a celestial body

• Opposition (chess), a term describing the position of the kings relative to each other

• Opposition proceeding, an administrative process available under some patent or trademark laws

• Opposition of the thumb

In politics

• Loyal opposition

• Opposition (politics), a party with views opposing those of the current government

• * Opposition (parliamentary), a form of political opposition

• ** Leader of the Opposition

• ** Opposition (Australia)

• ** Official Opposition (Canada)

• ** Official Opposition (India)

• ** Opposition Front Bench (Ireland)

• ** Opposition (Malaysia)

• ** Official Opposition (New Zealand)

• ** Official Opposition (United Kingdom)

• Opposition Party (United States), a 19th-century movement

In music

• The Opposition, a London post-punk band