Declaration (noun)

1. An official or formal announcement or statement.
2. The act of declaring something to be a certain way or to have a certain status.
3. An assertion or affirmation that something is true or exists.

Origin:

From middle english, from old french declaration, from latin declaratio, from declarare ("to declar.e")

Examples:

1. The government issued a declaration of war against the enemy.
2. Her declaration of love took him by surprise.
3. The Declaration of Independence was a landmark declaration by the 13 American colonies.
4. His declaration of innocence was widely accepted.
5. The company made a declaration of its profits for the year.