Definition of jag

• n. - A notch; a cleft; a barb; a ragged or sharp protuberance; a denticulation.
• n. - A part broken off; a fragment.
• n. - A cleft or division.
• v. t. - To cut into notches or teeth like those of a saw; to notch.
• n. - A small load, as of hay or grain in the straw, or of ore.
• v. t. - To carry, as a load; as, to jag hay, etc.