|Easton's Bible Dictionary|
The receptacle or small box placed beside the ark by the Philistines, in which they deposited the golden mice and the emerods as their trespass-offering (1 Samuel 6:8, 11, 15).
Noah Webster's Dictionary
1. (n.) A casket, chest, or trunk; especially, one used for keeping money or other valuables.
2. (n.) Fig.: Treasure or funds; -- usually in the plural.
3. (n.) A panel deeply recessed in the ceiling of a vault, dome, or portico; a caisson.
4. (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.
5. (n.) The chamber of a canal lock; also, a caisson or a cofferdam.
6. (v. t.) To put into a coffer.
7. (v. t.) To secure from leaking, as a shaft, by ramming clay behind the masonry or timbering.
8. (v. t.) To form with or in a coffer or coffers; to furnish with a coffer or coffers.
Int. Standard Bible Encyclopedia
kof'-er ('argaz): A small box such as that in which the Philistines placed their golden mice and other offerings in returning the Ark (1 Samuel 6:8, 11, 15).
Coffer (3 Occurrences)
1 Samuel 6:8 and take the ark of Yahweh, and lay it on the cart; and put the jewels of gold, which you return him for a trespass offering, in a coffer by its side; and send it away, that it may go. (WEB KJV JPS ASV DBY WBS YLT)
1 Samuel 6:11 and they put the ark of Yahweh on the cart, and the coffer with the mice of gold and the images of their tumors. (WEB KJV JPS ASV DBY WBS YLT)
1 Samuel 6:15 The Levites took down the ark of Yahweh, and the coffer that was with it, in which the jewels of gold were, and put them on the great stone: and the men of Beth Shemesh offered burnt offerings and sacrificed sacrifices the same day to Yahweh. (WEB KJV JPS ASV DBY WBS YLT)