From HomoExcelsior

1. A strongbox. 2. Financial resources; funds. 3. stole money from the union coffers. 4. A decorative sunken panel in a ceiling, dome, soffit, or vault. 5. The chamber formed by a canal lock. 6. A cofferdam. 7. A floating dock. 8. To put in a coffer. 9. To supply (a ceiling, for example) with decorative sunken panels.

---