Boyd’s Bible Dictionary:
(box). A coffin (Gen. 50:26). Treasure chest (2 Kings 12:9; 2 Chron. 24:8-11). Trunk or packing-case (Ezek. 27:24). In all other places, “Ark.”
Strong’s Dictionary of Hebrew Words:
Meaning:
from an unused root meaning to store; treasure; by implication, a coffer
KJV Usage:
chest, treasury