The complete opposite, opposite in every way.

plural of polar opposite

(childish) A contrived holiday on which everything is done backwards, for example "yes" means "no".

(idiomatic) Holding starkly opposite views on an issue.

plural of Leader of the Opposition

(politics, UK) In a house of legislature following the model of the Westminster system (such as the UK House of Commons), the parliamentary leader of the largest political party not forming the government.

A grammatical case expressing contrariety or opposition, corresponding to the English preposition "against".

(politics, sometimes attributive) The force acting against the opposition.

The team in a British Parliamentary Style debate which gets the sixth and eighth (last) speech.

The team in a British Parliamentary Style debate which gets the second and fourth speech (of a total of eight).