Noun

1. the jewelry that accompany the office of rulership in a monarchy. I.e., crown, scepter, signet ring, etc.

   The crown jewels in the United Kingdom are heavily guarded and anyone trying to steal them will certainly have a hard time.

2. A prized possession or asset
3. A part of a company sought by another in a hostile takeover
4. The male genitalia

   The whole crowd cringed as he got kicked in his crown jewels.