Definition of coffer

• n. - A casket, chest, or trunk; especially, one used for keeping money or other valuables.
• n. - Fig.: Treasure or funds; -- usually in the plural.
• n. - A panel deeply recessed in the ceiling of a vault, dome, or portico; a caisson.
• n. - A trench dug in the bottom of a dry moat, and extending across it, to enable the besieged to defend it by a raking fire.
• n. - The chamber of a canal lock; also, a caisson or a cofferdam.
• v. t. - To put into a coffer.
• v. t. - To secure from leaking, as a shaft, by ramming clay behind the masonry or timbering.
• v. t. - To form with or in a coffer or coffers; to furnish with a coffer or coffers.