coffern.[OF. cofre, F. coffre, L. cophinus basket, fr. Gr. . Cf. Coffin, n.]1. A casket, chest, or trunk; especially, one used for keeping money or other valuables.(Chaucer.)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. (Zol.) See Cowfish.()v. t.1. To put into a coffer.(Bacon.)2. (Mining.) To secure from leaking, as a shaft, by ramming clay behind the masonry or timbering.(Raymond.)3. To form with or in a coffer or coffers; to furnish with a coffer or coffers.()