1.verbTo make known in a formal manner; to proclaim; to announce; to declare.
2.verbTo criticize or speak out against (someone or something); to point out as deserving of reprehension, etc.; to openly accuse or condemn in a threatening manner; to invoke censure upon; to stigmatize; to blame.
"to denounce someone as a swindler, or as a coward"
3.verbTo make a formal or public accusation against; to inform against; to accuse.
"to denounce a confederate in crime"
4.verbTo proclaim in a threatening manner; to threaten by some outward sign or expression; make a menace of.
"to denounce war; to denounce punishment"
5.verbTo announce the termination of; especially a treaty or armistice.
6.verbTo claim the right of working a mine that is abandoned or insufficiently worked.