Hack (hăk), n. [Shortened fr. hackney. See Hackney.]
1. A horse, hackneyed or let out for common hire; also, a horse used in all kinds of work, or a saddle horse, as distinguished from hunting and carriage horses.
2. A coach or carriage let for hire; particularly, a coach with two seats inside facing each other; a hackney coach.
On horse, on foot, in hacks and gilded chariots. Pope.
3. A bookmaker who hires himself out for any sort of literary work; an overworked man; a drudge.
Here lies poor Ned Purdon, from misery freed,
Who long was a bookseller's hack. Goldsmith.
4. A procuress.