Cof·fer n.
1. A casket, chest, or trunk; especially, one used for keeping money or other valuables.
In ivory coffers I have stuffed my crowns. --Shak.
2. Fig.: Treasure or funds; -- usually in the plural.
He would discharge it without any burden to the queen's coffers, for honor sake. --Bacon.
Hold, here is half my coffer. --Shak.
3. Arch. A panel deeply recessed in the ceiling of a vault, dome, or portico; a caisson.
4. Fort. 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.
5. The chamber of a canal lock; also, a caisson or a cofferdam.
Coffer dam. Engin. See Cofferdam, in the Vocabulary.
Coffer fish. Zool. See Cowfish.