Emily Dickinson Lexicon

BAG, n. [Norm. bage, a bag, a coffer; bagnes, baggage. This word seems to be from the root of pack, pouch, Fr. poche, or of the same family; or it is from the sense of tying, binding; Sp. baga, a rope or cord for fastening loads on beasts of burden. Hence baggage; It. bagaglia; Sp. bagage; Port. bagagem; Fr. bagage; Arm. pacq, a pack, and bagaich.]

1. A sack; a pouch, usually of cloth or leather, used to hold, preserve or convey corn, and other commodities.
2. A sack in animal bodies containing some fluid or other substance; the udder of a female beast.
3. Formerly, a sort of silken purse tied to the hair.
4. In commerce, a certain quantity of a commodity, such as it is customary to carry to market in a sack; as, a bag of pepper or hops; a bag of corn.
5. Among farriers, a bag of asafetida and savin is tied to the bits of horses to restore their appetites. – Encyc.