One of the first material used for making woven cloth (Leviticus 13:47, 48, 52, 59; 19:19). The first-fruit of wool was to be offered to the priests (Deuteronomy 18:4). The law prohibiting the wearing of a garment "of divers sorts, as of woollen and linen together" (Deuteronomy 22:11) may, like some other laws of a similar character, have been intended to express symbolically the separateness and simplicity of God's covenant people. The wool of Damascus, famous for its whiteness, was of great repute in the Tyrian Market (Ezek. 27:18).

Noah Webster's New International Dictionary of the English Language

1. (n.) The soft and curled, or crisped, species of hair which grows on sheep and some other animals, and which in fineness sometimes approaches to fur; -- chiefly applied to the fleecy coat of the sheep, which constitutes a most essential material of clothing in all cold and temperate climates.

2. (n.) Short, thick hair, especially when crisped or curled.

3. (n.) A sort of pubescence, or a clothing of dense, curling hairs on the surface of certain plants.