Meaning

• A strong chest or box used for keeping money or valuables safe.

• An ornamental sunken panel in a ceiling or dome.

• A cofferdam.

• A supply or store of money, often belonging to an organization.

• A trench dug in the bottom of a dry moat, and extending across it, to enable the besieged to defend it with raking fire.

Meaning

• To put money or valuables in a coffer

• To decorate something, especially a ceiling, with coffers.