Attributive use (e.g., “peace talks”)—functions like an adjective though morphologically a noun.
Definitionen
Relating to, characterized by, or intended to promote peace; peaceful. Diplomats resumed the peace talks after a brief interruption.
Used in modern English as a salutation/farewell and as an imperative call for calm or silence.
Definitionen
Used as a greeting or farewell expressing goodwill or solidarity. "See you tomorrow—peace!" he said, waving good-bye.
Used imperatively to demand silence or calm. "Peace!" shouted the teacher, quieting the noisy class.
Synonyme
Hold it!
Settle down!
Calm down!
Pipe down!