noun
A state of tranquility, quiet, and harmony. For instance, a state free from civil disturbance.
A state free of oppressive and unpleasant thoughts and emotions.
(figuratively, euphemistic) Death.
Harmony in personal relations.
A state free of war, in particular war between different countries.
interjection
(archaic) Shut up!, silence!; be quiet, be silent.
(slang) Peace out; goodbye.
verb
To make peace; to put at peace; to be at peace.
(slang) To peace out.