(politics) Alternative form of Leader of the Opposition

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

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

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

plural of oppositional defiant disorder

A childhood disorder characterized by an ongoing pattern of anger-guided disobedience, hostility, and defiant behavior toward authority figures.

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

(idiomatic) A person who holds a position in an organization that corresponds to that held by another person in another organization; a counterpart

plural of opposite number

A side, party (e.g. a team or armed force) seen as adversary, enemy etc. opposite one (or more) other(s), as in a battle or team sports competition.