noun an ugly old woman.
2. hag ·noun a fury; a she-monster.
3. hag ·noun the hagdon or shearwater.
4. hag ·noun a witch, sorceress, or enchantress; also, a wizard.
5. hag ·noun a quagmire; mossy ground where peat or turf has been cut.
6. hag ·vt to harass; to weary with vexation.
7. hag ·noun an appearance of light and fire on a horse's mane or a man's hair.
8. hag ·noun a small wood, or part of a wood or copse, which is marked off or inclosed for felling, or which has been felled.
9. hag ·noun an eel-like marine marsipobranch (myxine glutinosa), allied to the lamprey. it has a suctorial mouth, with labial appendages, and a single pair of gill openings. it is the type of the order hyperotpeta. called also hagfish, borer, slime eel, sucker, and sleepmarken.