A casket, chest, or trunk; especially, one used for keeping money or other valuables.
- A strongbox.
- Financial resources; funds.
- A treasury: stole money from the union coffers.
- Architecture A decorative sunken panel in a ceiling, dome, soffit, or vault.
- The chamber formed by a canal lock.
- A cofferdam.
- A floating dock.
- To put in a coffer.
- Architecture To supply (a ceiling, for example) with decorative sunken panels.