Definition of privy seal in English:

privy seal

noun

  • (in the UK) a seal affixed to documents that are afterward to pass the Great Seal or that do not require it.

    • ‘The next few years saw his titles change rapidly, from principal secretary and master of the rolls to lord privy seal, where he also gained a peerage.’
    • ‘Next are the chaplains and clerks, clerks of the privy council, of the privy seal and the signet.’
    • ‘As first the great seal and then the privy seal were regarded by monarchs as too public, the keeper of the signet rose in importance.’