From Longman Dictionary of Contemporary Englishhold/keep your peacehold/keep your peaceformal old-fashionedQUIET to keep quiet even though you would like to say something → peace
Examples from the Corpus
hold/keep your peace• Colonel Fergusson nodded indulgently at such pertness and obstinacy, but held his peace.• Gorbachev, like any husband in his circumstances, kept his peace.• And since the credit accrued to him, he held his peace.• But she held her peace and waited for the miracle.• But Kate knew when enough was enough so she kept her peace.• No, better to hold her peace and pretend.• So I decide to hold my peace for a little while longer.• Why did he want to hold his peace? 