Webster’s Revised Unabridged Dictionary · 1913
Jag
Jag (jăg), n. [Prob. of Celtic origin; cf. W. gag aperture, cleft, chink; akin to Ir. & Gael. gag.] [Written also jagg.]
1. A notch; a cleft; a barb; a ragged or sharp protuberance; a denticulation.
Arethuss arose . . . From rock and from jag. Shelley.
Garments thus beset with long jags. Holland.
2. A part broken off; a fragment. Bp. Hacket.
3. (Bot.) A cleft or division.
Jag bolt, a bolt with a nicked or barbed shank which resists retraction, as when leaded into stone.
Jag, v. t. [imp. & p. p. Jagged; p. pr. & vb. n. Jagging.] To cut into notches or teeth like those of a saw; to notch. [Written also jagg.]
Jagging iron, a wheel with a zigzag or jagged edge for cutting cakes or pastry into ornamental figures.
Jag, n. [Scot. jag, jaug, a leather bag or wallet, a pocket. Cf. Jag a notch.] A small load, as of hay or grain in the straw, or of ore. [Prov. Eng. & Colloq. U.S.] [Written also jagg.] Forby.
Jag, v. t. To carry, as a load; as, to jag hay, etc. [Prov. Eng. & Colloq. U.S.]