1. To make an official announcement by word of mouth in some public place; also, to cause this to be done by officers or agents: The President proclaimed a national day of mourning for the brave soldier who died in an auto accident.
2. To make a public declaration of war against another power; to declare war: The first minister for the country stood on the balcony, proclaiming that a state of peace no longer existed between his country and the nation on the other side of the river.
3. To declare publicly; to make known aloud or openly; to publish: A ritual at the church was to proclaim the upcoming marriage ceremony of couples in the congregation.

After winning every competition in tennis at his university, Clarence was proclaimed "campus athlete of the year".

4. Etymology: from Latin proclamare "to cry or to call out", from pro-, "forth" + clamare, "to cry out".