(of a governmental authority) To make a formal pronouncement, or sign a legal document, that initiates a state of war between one nation and another, usually before hostilities begin.

A formal announcement by a country or other body with military capability that it is in a state of war with another such entity.

(law) A legal document that is affirmed rather than being sworn under oath.

(law) A statement that would normally be deemed inadmissible as evidence in a court of law as hearsay, but is deemed admissible because it was made by a person who believed himself to be dying, is about the circumstances of that person's death, and (in some cases) was followed by that person's actual death.

plural of statutory declaration

(card games) An undertaking to take all thirteen tricks with no trump suit.

self-proclaimed

plural of customs declaration

A statement giving the details and value of goods being imported or exported, usually required for the purpose of assessing customs duty.

plural of declaration of war