It is a solemn declaration that we will not do that thing which such order, decree, or edict commands, or that we will do what it prohibits.
Washington, sir, was not a lawyer, and who can wonder that his fair mind was alarmed by such a solemn declaration?
To make a solemn declaration or affirmation of; to proclaim; to display; as, to protest one's loyalty.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "solemn declaration" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.