noun

• A written or oral indication of a fact, opinion, intention, belief, etc.
• A list of items for various legal purposes, e.g. customs declaration.
• The act or process of declaring.
• (cricket) The act, by the captain of a batting side, of declaring an innings closed.
• (law) In common law, the formal document specifying plaintiff's cause of action, including the facts necessary to sustain a proper cause of action, and to advise the defendant of the grounds upon which he is being sued.
• (computing) The specification of an object, such as a variable or function, establishing its existence but not necessarily describing its contents.