A public declaration of intentions (as issued by a political party or government); SYN. pronunciamento.
In politics, the published prospectus of a party, setting out the policies that the party will pursue if elected to govern. When elected to power a party will often claim that the contents of its manifesto constitute a mandate to introduce legislation to bring these policies into effect.
In art, a manifesto is a document setting out the aims and aspirations of an artistic movement. For example, the Futurists and the Surrealists published manifestoes.