Green’s Dictionary of Slang

1. a brothel; cit. 1599 is a double entendre.

1599		H. Porter Two Angry Women of Abington H3: mrs. bar: Shees hid in this same Warren, Ile lay money.
1609		Dekker Gul’s Horne-Booke 15: The spending Englishman, who to maintaine a paltry warren of unprofitable Conies, disimparkes the stately swift-footed wild Deere.
1675		W. Lawrence Diary Aug. 27: The Warren at Windsor was much over-stock’t, so that a Coney there was a very dead Commodity, and might have sate cross-legg’d like those that have a slit in the Belly, and are hung up in a poulterer’s Shop.
c.1690		‘The London Libertine’ in Fawcett Broadside Ballads of the Restoration Period (1930) For while the Merchant walks the Change, / I can in his little Warren range, / And freely play the Game, / Which I forbear to name.
c.1698		B.E. Dict. Canting Crew n.p.: Warren [...] a Bawdy-house.
1725		New Canting Dict. [as cit. c.1698].
1734		Pretty Doings in a Protestant Nation [title page] Inscribed to the Bona-Roba’s in the several Hundreds, Chaces, Parks and Warrens, North, East, West and South of Covent-Garden; and to the Band of Petticoat Pensioners, etc.
1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.

2. the vagina.

1680

M. Stevenson Wits Paraphras’d 25: Which makes me wish thee in my Warren, / For fear the Burrough shou’d grow barren.

3. a boarding school.

c.1698		B.E. Dict. Canting Crew n.p.: Warren [...] a Boarding-school.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.